656101452640 has 48 divisors (see below), whose sum is σ = 1550099744928. Its totient is φ = 262430411776.

The previous prime is 656101452593. The next prime is 656101452673. The reversal of 656101452640 is 46254101656.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 656101452593 and 656101452602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5124444 + ... + 5250916.

It is an arithmetic number, because the mean of its divisors is an integer number (32293744686).

Almost surely, 2^656101452640 is an apocalyptic number.

It is an amenable number.

656101452640 is an abundant number, since it is smaller than the sum of its proper divisors (893998292288).

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

656101452640 is a wasteful number, since it uses less digits than its factorization.

656101452640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158911 (or 158903 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 656101452640 in words is "six hundred fifty-six billion, one hundred one million, four hundred fifty-two thousand, six hundred forty".