256316669402 has 8 divisors (see below), whose sum is σ = 384685911936. Its totient is φ = 128088032092.

The previous prime is 256316669351. The next prime is 256316669449. The reversal of 256316669402 is 204966613652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35146748 + ... + 35154039.

It is an arithmetic number, because the mean of its divisors is an integer number (48085738992).

Almost surely, 2^256316669402 is an apocalyptic number.

256316669402 is a deficient number, since it is larger than the sum of its proper divisors (128369242534).

256316669402 is a wasteful number, since it uses less digits than its factorization.

256316669402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70302612.

The product of its (nonzero) digits is 2799360, while the sum is 50.

The spelling of 256316669402 in words is "two hundred fifty-six billion, three hundred sixteen million, six hundred sixty-nine thousand, four hundred two".