256613450428 has 6 divisors (see below), whose sum is σ = 449073538256. Its totient is φ = 128306725212.

The previous prime is 256613450417. The next prime is 256613450449. The reversal of 256613450428 is 824054316652.

It is a happy number.

It is a super-2 number, since 2×256613450428² (a number of 24 digits) 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 (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32076681300 + ... + 32076681307.

Almost surely, 2^256613450428 is an apocalyptic number.

It is an amenable number.

256613450428 is a deficient number, since it is larger than the sum of its proper divisors (192460087828).

256613450428 is a wasteful number, since it uses less digits than its factorization.

256613450428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64153362611 (or 64153362609 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 46.

The spelling of 256613450428 in words is "two hundred fifty-six billion, six hundred thirteen million, four hundred fifty thousand, four hundred twenty-eight".