256707353526540 has 48 divisors (see below), whose sum is σ = 821463531286272. Its totient is φ = 58675966520256.

The previous prime is 256707353526523. The next prime is 256707353526551. The reversal of 256707353526540 is 45625353707652.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 305603991874 + ... + 305603992713.

It is an arithmetic number, because the mean of its divisors is an integer number (17113823568464).

Almost surely, 2^{256707353526540} is an apocalyptic number.

256707353526540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256707353526540 is an abundant number, since it is smaller than the sum of its proper divisors (564756177759732).

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

256707353526540 is a wasteful number, since it uses less digits than its factorization.

256707353526540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611207984606 (or 611207984604 counting only the distinct ones).

The product of its (nonzero) digits is 158760000, while the sum is 60.

The spelling of 256707353526540 in words is "two hundred fifty-six trillion, seven hundred seven billion, three hundred fifty-three million, five hundred twenty-six thousand, five hundred forty".