656030435640 has 64 divisors (see below), whose sum is σ = 2035956535200. Its totient is φ = 168908984832.

The previous prime is 656030435629. The next prime is 656030435707. The reversal of 656030435640 is 46534030656.

It is a happy number.

It is a super-3 number, since 3×656030435640³ (a number of 36 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 656030435592 and 656030435601.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94253767 + ... + 94260726.

Almost surely, 2^656030435640 is an apocalyptic number.

656030435640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

656030435640 is an abundant number, since it is smaller than the sum of its proper divisors (1379926099560).

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

656030435640 is a wasteful number, since it uses less digits than its factorization.

656030435640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188514536 (or 188514532 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 42.

The spelling of 656030435640 in words is "six hundred fifty-six billion, thirty million, four hundred thirty-five thousand, six hundred forty".