257279439140 has 96 divisors (see below), whose sum is σ = 563492160000. Its totient is φ = 98599034880.

The previous prime is 257279439127. The next prime is 257279439149. The reversal of 257279439140 is 41934972752.

257279439140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (257279439149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13356236 + ... + 13375484.

It is an arithmetic number, because the mean of its divisors is an integer number (5869710000).

Almost surely, 2^257279439140 is an apocalyptic number.

257279439140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257279439140 is an abundant number, since it is smaller than the sum of its proper divisors (306212720860).

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

257279439140 is a wasteful number, since it uses less digits than its factorization.

257279439140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19605 (or 19603 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 53.

The spelling of 257279439140 in words is "two hundred fifty-seven billion, two hundred seventy-nine million, four hundred thirty-nine thousand, one hundred forty".