256154434560 has 176 divisors, whose sum is σ = 910327101600. Its totient is φ = 68307812352.

The previous prime is 256154434519. The next prime is 256154434609. The reversal of 256154434560 is 65434451652.

256154434560 is a `hidden beast` number, since 2 + 5 + 6 + 1 + 54 + 4 + 34 + 560 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 788245 + ... + 1064724.

Almost surely, 2^256154434560 is an apocalyptic number.

256154434560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256154434560 is an abundant number, since it is smaller than the sum of its proper divisors (654172667040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256154434560 is a wasteful number, since it uses less digits than its factorization.

256154434560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853003 (or 1852979 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 45.

The spelling of 256154434560 in words is "two hundred fifty-six billion, one hundred fifty-four million, four hundred thirty-four thousand, five hundred sixty".