257898996999 has 96 divisors (see below), whose sum is σ = 469755686400. Its totient is φ = 133040517120.

The previous prime is 257898996959. The next prime is 257898997007. The reversal of 257898996999 is 999699898752.

It is not a de Polignac number, because 257898996999 - 2⁷ = 257898996871 is a prime.

It is a super-2 number, since 2×257898996999² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257898996959) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2049207 + ... + 2171415.

It is an arithmetic number, because the mean of its divisors is an integer number (4893288400).

Almost surely, 2^257898996999 is an apocalyptic number.

257898996999 is a deficient number, since it is larger than the sum of its proper divisors (211856689401).

257898996999 is a wasteful number, since it uses less digits than its factorization.

257898996999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122325 (or 122322 counting only the distinct ones).

The product of its digits is 14285134080, while the sum is 90.

The spelling of 257898996999 in words is "two hundred fifty-seven billion, eight hundred ninety-eight million, nine hundred ninety-six thousand, nine hundred ninety-nine".