256420636300 has 18 divisors (see below), whose sum is σ = 556432780988. Its totient is φ = 102568254480.

The previous prime is 256420636271. The next prime is 256420636309. The reversal of 256420636300 is 3636024652.

It is a self number, because there is not a number n which added to its sum of digits gives 256420636300.

It is not an unprimeable number, because it can be changed into a prime (256420636309) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1282103082 + ... + 1282103281.

Almost surely, 2^256420636300 is an apocalyptic number.

256420636300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256420636300 is an abundant number, since it is smaller than the sum of its proper divisors (300012144688).

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

256420636300 is a wasteful number, since it uses less digits than its factorization.

256420636300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2564206377 (or 2564206370 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 37.

The spelling of 256420636300 in words is "two hundred fifty-six billion, four hundred twenty million, six hundred thirty-six thousand, three hundred".