256101646 has 16 divisors (see below), whose sum is σ = 409248000. Its totient is φ = 119848248.

The previous prime is 256101623. The next prime is 256101649. The reversal of 256101646 is 646101652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256101649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37446 + ... + 43753.

It is an arithmetic number, because the mean of its divisors is an integer number (25578000).

Almost surely, 2^256101646 is an apocalyptic number.

256101646 is a deficient number, since it is larger than the sum of its proper divisors (153146354).

256101646 is a wasteful number, since it uses less digits than its factorization.

256101646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81303.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 256101646 is about 16003.1761222577. The cubic root of 256101646 is about 635.0444476710.

The spelling of 256101646 in words is "two hundred fifty-six million, one hundred one thousand, six hundred forty-six".