256603516 has 36 divisors (see below), whose sum is σ = 489382992. Its totient is φ = 117671424.

The previous prime is 256603499. The next prime is 256603517. The reversal of 256603516 is 615306652.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256603517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111756 + ... + 114028.

It is an arithmetic number, because the mean of its divisors is an integer number (13593972).

Almost surely, 2^256603516 is an apocalyptic number.

256603516 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

256603516 is a deficient number, since it is larger than the sum of its proper divisors (232779476).

256603516 is a wasteful number, since it uses less digits than its factorization.

256603516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2470 (or 2455 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 256603516 is about 16018.8487726178. The cubic root of 256603516 is about 635.4589989525.

The spelling of 256603516 in words is "two hundred fifty-six million, six hundred three thousand, five hundred sixteen".