656405562406 has 32 divisors (see below), whose sum is σ = 1100455735680. Its totient is φ = 291052027200.

The previous prime is 656405562377. The next prime is 656405562467. The reversal of 656405562406 is 604265504656.

It is a self number, because there is not a number n which added to its sum of digits gives 656405562406.

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, 7811925 + ... + 7895503.

It is an arithmetic number, because the mean of its divisors is an integer number (34389241740).

Almost surely, 2^656405562406 is an apocalyptic number.

656405562406 is a deficient number, since it is larger than the sum of its proper divisors (444050173274).

656405562406 is a wasteful number, since it uses less digits than its factorization.

656405562406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92340.

The product of its (nonzero) digits is 5184000, while the sum is 49.

The spelling of 656405562406 in words is "six hundred fifty-six billion, four hundred five million, five hundred sixty-two thousand, four hundred six".