655376229889920 has 1536 divisors, whose sum is σ = 2971290276864000. Its totient is φ = 128959572787200.

The previous prime is 655376229889919. The next prime is 655376229889921. The reversal of 655376229889920 is 29988922673556.

It is a happy number.

655376229889920 is a `hidden beast` number, since 6 + 55 + 376 + 2 + 2 + 98 + 8 + 99 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (655376229889919) and next prime (655376229889921).

It is a self number, because there is not a number n which added to its sum of digits gives 655376229889920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655376229889921) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 21395833005 + ... + 21395863635.

It is an arithmetic number, because the mean of its divisors is an integer number (1934433774000).

Almost surely, 2^{655376229889920} is an apocalyptic number.

655376229889920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655376229889920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1485645138432000).

655376229889920 is an abundant number, since it is smaller than the sum of its proper divisors (2315914046974080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

655376229889920 is a wasteful number, since it uses less digits than its factorization.

655376229889920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33232 (or 33217 counting only the distinct ones).

The product of its (nonzero) digits is 7054387200, while the sum is 81.

The spelling of 655376229889920 in words is "six hundred fifty-five trillion, three hundred seventy-six billion, two hundred twenty-nine million, eight hundred eighty-nine thousand, nine hundred twenty".