256148549636 has 24 divisors (see below), whose sum is σ = 515159104320. Its totient is φ = 109164663072.

The previous prime is 256148549623. The next prime is 256148549677. The reversal of 256148549636 is 636945841652.

It is a super-2 number, since 2×256148549636² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25548515 + ... + 25558538.

It is an arithmetic number, because the mean of its divisors is an integer number (21464962680).

Almost surely, 2^256148549636 is an apocalyptic number.

It is an amenable number.

256148549636 is an abundant number, since it is smaller than the sum of its proper divisors (259010554684).

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

256148549636 is a wasteful number, since it uses less digits than its factorization.

256148549636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51107243 (or 51107241 counting only the distinct ones).

The product of its digits is 37324800, while the sum is 59.

The spelling of 256148549636 in words is "two hundred fifty-six billion, one hundred forty-eight million, five hundred forty-nine thousand, six hundred thirty-six".