655340860920 has 128 divisors (see below), whose sum is σ = 2020704920640. Its totient is φ = 169904148480.

The previous prime is 655340860847. The next prime is 655340860939. The reversal of 655340860920 is 29068043556.

It is a self number, because there is not a number n which added to its sum of digits gives 655340860920.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5809374 + ... + 5921106.

Almost surely, 2^655340860920 is an apocalyptic number.

655340860920 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 655340860920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1010352460320).

655340860920 is an abundant number, since it is smaller than the sum of its proper divisors (1365364059720).

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

655340860920 is a wasteful number, since it uses less digits than its factorization.

655340860920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113105 (or 113101 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 48.

The spelling of 655340860920 in words is "six hundred fifty-five billion, three hundred forty million, eight hundred sixty thousand, nine hundred twenty".