256149916 has 48 divisors (see below), whose sum is σ = 504000000. Its totient is φ = 112919040.

The previous prime is 256149899. The next prime is 256149941. The reversal of 256149916 is 619941652.

It is a super-2 number, since 2×256149916² = 131225558933614112, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204460 + ... + 205708.

It is an arithmetic number, because the mean of its divisors is an integer number (10500000).

Almost surely, 2^256149916 is an apocalyptic number.

It is an amenable number.

256149916 is a deficient number, since it is larger than the sum of its proper divisors (247850084).

256149916 is a wasteful number, since it uses less digits than its factorization.

256149916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1402 (or 1400 counting only the distinct ones).

The product of its digits is 116640, while the sum is 43.

The square root of 256149916 is about 16004.6841893241. The cubic root of 256149916 is about 635.0843428588.

The spelling of 256149916 in words is "two hundred fifty-six million, one hundred forty-nine thousand, nine hundred sixteen".