256100571500 has 48 divisors (see below), whose sum is σ = 592225058880. Its totient is φ = 96414329600.

The previous prime is 256100571499. The next prime is 256100571509. The reversal of 256100571500 is 5175001652.

It is a super-2 number, since 2×256100571500² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256100571509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15056240 + ... + 15073239.

It is an arithmetic number, because the mean of its divisors is an integer number (12338022060).

Almost surely, 2^256100571500 is an apocalyptic number.

256100571500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256100571500 is an abundant number, since it is smaller than the sum of its proper divisors (336124487380).

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

256100571500 is a wasteful number, since it uses less digits than its factorization.

256100571500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30129515 (or 30129503 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 32.

The spelling of 256100571500 in words is "two hundred fifty-six billion, one hundred million, five hundred seventy-one thousand, five hundred".