256705514310 has 256 divisors, whose sum is σ = 730939023360. Its totient is φ = 56490670080.

The previous prime is 256705514293. The next prime is 256705514321. The reversal of 256705514310 is 13415507652.

It is a super-2 number, since 2×256705514310² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 159147064 + ... + 159148676.

It is an arithmetic number, because the mean of its divisors is an integer number (2855230560).

Almost surely, 2^256705514310 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256705514310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (365469511680).

256705514310 is an abundant number, since it is smaller than the sum of its proper divisors (474233509050).

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

256705514310 is a wasteful number, since it uses less digits than its factorization.

256705514310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943.

The product of its (nonzero) digits is 126000, while the sum is 39.

The spelling of 256705514310 in words is "two hundred fifty-six billion, seven hundred five million, five hundred fourteen thousand, three hundred ten".