256536345 has 32 divisors (see below), whose sum is σ = 443342592. Its totient is φ = 125920512.

The previous prime is 256536311. The next prime is 256536389. The reversal of 256536345 is 543635652.

It is not a de Polignac number, because 256536345 - 2¹² = 256532249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70972 + ... + 74498.

It is an arithmetic number, because the mean of its divisors is an integer number (13854456).

Almost surely, 2^256536345 is an apocalyptic number.

It is an amenable number.

256536345 is a deficient number, since it is larger than the sum of its proper divisors (186806247).

256536345 is a wasteful number, since it uses less digits than its factorization.

256536345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3921.

The product of its digits is 324000, while the sum is 39.

The square root of 256536345 is about 16016.7520115659. The cubic root of 256536345 is about 635.4035461640.

The spelling of 256536345 in words is "two hundred fifty-six million, five hundred thirty-six thousand, three hundred forty-five".