256733340344530 has 64 divisors (see below), whose sum is σ = 541295303028480. Its totient is φ = 85836470759424.

The previous prime is 256733340344527. The next prime is 256733340344543. The reversal of 256733340344530 is 35443043337652.

It is a super-3 number, since 3×256733340344530³ (a number of 44 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67262335 + ... + 70976674.

It is an arithmetic number, because the mean of its divisors is an integer number (8457739109820).

Almost surely, 2^{256733340344530} is an apocalyptic number.

256733340344530 is an abundant number, since it is smaller than the sum of its proper divisors (284561962683950).

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

256733340344530 is a wasteful number, since it uses less digits than its factorization.

256733340344530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138239683.

The product of its (nonzero) digits is 32659200, while the sum is 52.

The spelling of 256733340344530 in words is "two hundred fifty-six trillion, seven hundred thirty-three billion, three hundred forty million, three hundred forty-four thousand, five hundred thirty".