256641147270 has 48 divisors (see below), whose sum is σ = 667301414832. Its totient is φ = 68434107840.

The previous prime is 256641147229. The next prime is 256641147281. The reversal of 256641147270 is 72741146652.

256641147270 is a `hidden beast` number, since 2 + 56 + 64 + 1 + 1 + 472 + 70 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2004580 + ... + 2128760.

It is an arithmetic number, because the mean of its divisors is an integer number (13902112809).

Almost surely, 2^256641147270 is an apocalyptic number.

256641147270 is an abundant number, since it is smaller than the sum of its proper divisors (410660267562).

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

256641147270 is a wasteful number, since it uses less digits than its factorization.

256641147270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147157 (or 147154 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The spelling of 256641147270 in words is "two hundred fifty-six billion, six hundred forty-one million, one hundred forty-seven thousand, two hundred seventy".