257206556882 has 16 divisors (see below), whose sum is σ = 421563420000. Its totient is φ = 116723192640.

The previous prime is 257206556869. The next prime is 257206556897. The reversal of 257206556882 is 288655602752.

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, 9430007 + ... + 9457242.

It is an arithmetic number, because the mean of its divisors is an integer number (26347713750).

Almost surely, 2^257206556882 is an apocalyptic number.

257206556882 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

257206556882 is a deficient number, since it is larger than the sum of its proper divisors (164356863118).

257206556882 is a wasteful number, since it uses less digits than its factorization.

257206556882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18887881.

The product of its (nonzero) digits is 16128000, while the sum is 56.

The spelling of 257206556882 in words is "two hundred fifty-seven billion, two hundred six million, five hundred fifty-six thousand, eight hundred eighty-two".