257860685488 has 40 divisors (see below), whose sum is σ = 571057290272. Its totient is φ = 110496227328.

The previous prime is 257860685431. The next prime is 257860685539. The reversal of 257860685488 is 884586068752.

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, 659506 + ... + 975022.

Almost surely, 2^257860685488 is an apocalyptic number.

257860685488 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

257860685488 is an abundant number, since it is smaller than the sum of its proper divisors (313196604784).

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

257860685488 is a wasteful number, since it uses less digits than its factorization.

257860685488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322829 (or 322823 counting only the distinct ones).

The product of its (nonzero) digits is 206438400, while the sum is 67.

The spelling of 257860685488 in words is "two hundred fifty-seven billion, eight hundred sixty million, six hundred eighty-five thousand, four hundred eighty-eight".