256109536 has 12 divisors (see below), whose sum is σ = 504215712. Its totient is φ = 128054752.

The previous prime is 256109519. The next prime is 256109549. The reversal of 256109536 is 635901652.

It is a junction number, because it is equal to n+sod(n) for n = 256109495 and 256109504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4001680 + ... + 4001743.

It is an arithmetic number, because the mean of its divisors is an integer number (42017976).

Almost surely, 2^256109536 is an apocalyptic number.

It is an amenable number.

256109536 is a deficient number, since it is larger than the sum of its proper divisors (248106176).

256109536 is an equidigital number, since it uses as much as digits as its factorization.

256109536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8003433 (or 8003425 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 256109536 is about 16003.4226339243. The cubic root of 256109536 is about 635.0509691041.

The spelling of 256109536 in words is "two hundred fifty-six million, one hundred nine thousand, five hundred thirty-six".