256101630 has 16 divisors (see below), whose sum is σ = 614643984. Its totient is φ = 68293760.

The previous prime is 256101623. The next prime is 256101649. The reversal of 256101630 is 36101652.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 256101630.

It is a congruent number.

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, 4268331 + ... + 4268390.

It is an arithmetic number, because the mean of its divisors is an integer number (38415249).

Almost surely, 2^256101630 is an apocalyptic number.

256101630 is an abundant number, since it is smaller than the sum of its proper divisors (358542354).

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

256101630 is a wasteful number, since it uses less digits than its factorization.

256101630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8536731.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 256101630 is about 16003.1756223570. The cubic root of 256101630 is about 635.0444344461.

The spelling of 256101630 in words is "two hundred fifty-six million, one hundred one thousand, six hundred thirty".