655958640960 has 1344 divisors, whose sum is σ = 2805572321280. Its totient is φ = 143700480000.

The previous prime is 655958640941. The next prime is 655958640973. The reversal of 655958640960 is 69046859556.

655958640960 is a `hidden beast` number, since 6 + 5 + 5 + 9 + 586 + 40 + 9 + 6 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1344).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1981747995 + ... + 1981748325.

Almost surely, 2^655958640960 is an apocalyptic number.

655958640960 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 655958640960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1402786160640).

655958640960 is an abundant number, since it is smaller than the sum of its proper divisors (2149613680320).

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

655958640960 is a wasteful number, since it uses less digits than its factorization.

655958640960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553 (or 530 counting only the distinct ones).

The product of its (nonzero) digits is 69984000, while the sum is 63.

The spelling of 655958640960 in words is "six hundred fifty-five billion, nine hundred fifty-eight million, six hundred forty thousand, nine hundred sixty".