656782463394 has 80 divisors (see below), whose sum is σ = 1538986090752. Its totient is φ = 208956065472.

The previous prime is 656782463329. The next prime is 656782463429. The reversal of 656782463394 is 493364287656.

656782463394 is a `hidden beast` number, since 6 + 5 + 6 + 7 + 82 + 463 + 3 + 94 = 666.

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 39 ways as a sum of consecutive naturals, for example, 1534782 + ... + 1915494.

Almost surely, 2^656782463394 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 656782463394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (769493045376).

656782463394 is an abundant number, since it is smaller than the sum of its proper divisors (882203627358).

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

656782463394 is a wasteful number, since it uses less digits than its factorization.

656782463394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381213 (or 381204 counting only the distinct ones).

The product of its digits is 156764160, while the sum is 63.

The spelling of 656782463394 in words is "six hundred fifty-six billion, seven hundred eighty-two million, four hundred sixty-three thousand, three hundred ninety-four".