656212631456 has 24 divisors (see below), whose sum is σ = 1292025984480. Its totient is φ = 328079048128.

The previous prime is 656212631443. The next prime is 656212631491. The reversal of 656212631456 is 654136212656.

It is a self number, because there is not a number n which added to its sum of digits gives 656212631456.

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 3 ways as a sum of consecutive naturals, for example, 458246 + ... + 1233861.

It is an arithmetic number, because the mean of its divisors is an integer number (53834416020).

Almost surely, 2^656212631456 is an apocalyptic number.

It is an amenable number.

656212631456 is a deficient number, since it is larger than the sum of its proper divisors (635813353024).

656212631456 is a wasteful number, since it uses less digits than its factorization.

656212631456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1704236 (or 1704228 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 47.

The spelling of 656212631456 in words is "six hundred fifty-six billion, two hundred twelve million, six hundred thirty-one thousand, four hundred fifty-six".