655291334880 has 1152 divisors, whose sum is σ = 2875159203840. Its totient is φ = 138171930624.

The previous prime is 655291334879. The next prime is 655291334899. The reversal of 655291334880 is 88433192556.

655291334880 is a `hidden beast` number, since 6 + 5 + 5 + 29 + 133 + 488 + 0 = 666.

It is a super-2 number, since 2×655291334880² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 413954569 + ... + 413956151.

It is an arithmetic number, because the mean of its divisors is an integer number (2495797920).

Almost surely, 2^655291334880 is an apocalyptic number.

655291334880 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 655291334880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1437579601920).

655291334880 is an abundant number, since it is smaller than the sum of its proper divisors (2219867868960).

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

655291334880 is a wasteful number, since it uses less digits than its factorization.

655291334880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1652 (or 1613 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 54.

The spelling of 655291334880 in words is "six hundred fifty-five billion, two hundred ninety-one million, three hundred thirty-four thousand, eight hundred eighty".