257964207280 has 40 divisors (see below), whose sum is σ = 645902690832. Its totient is φ = 95248322304.

The previous prime is 257964207269. The next prime is 257964207331. The reversal of 257964207280 is 82702469752.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (52).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124020214 + ... + 124022293.

Almost surely, 2^257964207280 is an apocalyptic number.

257964207280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257964207280 is an abundant number, since it is smaller than the sum of its proper divisors (387938483552).

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

257964207280 is a wasteful number, since it uses less digits than its factorization.

257964207280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248042533 (or 248042527 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 52.

The spelling of 257964207280 in words is "two hundred fifty-seven billion, nine hundred sixty-four million, two hundred seven thousand, two hundred eighty".