256636457060 has 48 divisors (see below), whose sum is σ = 571342947840. Its totient is φ = 96496842240.

The previous prime is 256636457039. The next prime is 256636457071. The reversal of 256636457060 is 60754636652.

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 15 ways as a sum of consecutive naturals, for example, 189620 + ... + 741099.

It is an arithmetic number, because the mean of its divisors is an integer number (11902978080).

Almost surely, 2^256636457060 is an apocalyptic number.

256636457060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256636457060 is an abundant number, since it is smaller than the sum of its proper divisors (314706490780).

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

256636457060 is a wasteful number, since it uses less digits than its factorization.

256636457060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931556 (or 931554 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 50.

The spelling of 256636457060 in words is "two hundred fifty-six billion, six hundred thirty-six million, four hundred fifty-seven thousand, sixty".