656011498544640 has 480 divisors, whose sum is σ = 2692684252177920. Its totient is φ = 149945484386304.

The previous prime is 656011498544573. The next prime is 656011498544641. The reversal of 656011498544640 is 46445894110656.

656011498544640 is a `hidden beast` number, since 6 + 5 + 6 + 0 + 1 + 1 + 49 + 8 + 544 + 6 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (480).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656011498544641) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 70970100 + ... + 79679219.

It is an arithmetic number, because the mean of its divisors is an integer number (5609758858704).

Almost surely, 2^{656011498544640} is an apocalyptic number.

656011498544640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

656011498544640 is an abundant number, since it is smaller than the sum of its proper divisors (2036672753633280).

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

656011498544640 is an equidigital number, since it uses as much as digits as its factorization.

656011498544640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150649364 (or 150649336 counting only the distinct ones).

The product of its (nonzero) digits is 99532800, while the sum is 63.

The spelling of 656011498544640 in words is "six hundred fifty-six trillion, eleven billion, four hundred ninety-eight million, five hundred forty-four thousand, six hundred forty".