656479839630 has 32 divisors (see below), whose sum is σ = 1575662465664. Its totient is φ = 175048973856.

The previous prime is 656479839619. The next prime is 656479839647. The reversal of 656479839630 is 36938974656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 332212 + ... + 1193031.

It is an arithmetic number, because the mean of its divisors is an integer number (49239452052).

Almost surely, 2^656479839630 is an apocalyptic number.

656479839630 is an abundant number, since it is smaller than the sum of its proper divisors (919182626034).

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

656479839630 is a wasteful number, since it uses less digits than its factorization.

656479839630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539600.

The product of its (nonzero) digits is 176359680, while the sum is 66.

The spelling of 656479839630 in words is "six hundred fifty-six billion, four hundred seventy-nine million, eight hundred thirty-nine thousand, six hundred thirty".