257320527780 has 24 divisors (see below), whose sum is σ = 720497477952. Its totient is φ = 68618807392.

The previous prime is 257320527733. The next prime is 257320527811. The reversal of 257320527780 is 87725023752.

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, 2144337672 + ... + 2144337791.

It is an arithmetic number, because the mean of its divisors is an integer number (30020728248).

Almost surely, 2^257320527780 is an apocalyptic number.

257320527780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257320527780 is an abundant number, since it is smaller than the sum of its proper divisors (463176950172).

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

257320527780 is a wasteful number, since it uses less digits than its factorization.

257320527780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4288675475 (or 4288675473 counting only the distinct ones).

The product of its (nonzero) digits is 1646400, while the sum is 48.

The spelling of 257320527780 in words is "two hundred fifty-seven billion, three hundred twenty million, five hundred twenty-seven thousand, seven hundred eighty".