256734145452630 has 64 divisors (see below), whose sum is σ = 628997738443200. Its totient is φ = 67046042027520.

The previous prime is 256734145452619. The next prime is 256734145452679. The reversal of 256734145452630 is 36254541437652.

It is a congruent number.

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, 305895085 + ... + 306733224.

It is an arithmetic number, because the mean of its divisors is an integer number (9828089663175).

Almost surely, 2^{256734145452630} is an apocalyptic number.

256734145452630 is an abundant number, since it is smaller than the sum of its proper divisors (372263592990570).

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

256734145452630 is a wasteful number, since it uses less digits than its factorization.

256734145452630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612628609.

The product of its (nonzero) digits is 72576000, while the sum is 57.

The spelling of 256734145452630 in words is "two hundred fifty-six trillion, seven hundred thirty-four billion, one hundred forty-five million, four hundred fifty-two thousand, six hundred thirty".