257340616860 has 24 divisors (see below), whose sum is σ = 720553727376. Its totient is φ = 68624164480.

The previous prime is 257340616837. The next prime is 257340616909. The reversal of 257340616860 is 68616043752.

It is a congruent number.

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, 2144505081 + ... + 2144505200.

It is an arithmetic number, because the mean of its divisors is an integer number (30023071974).

Almost surely, 2^257340616860 is an apocalyptic number.

257340616860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257340616860 is an abundant number, since it is smaller than the sum of its proper divisors (463213110516).

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

257340616860 is a wasteful number, since it uses less digits than its factorization.

257340616860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4289010293 (or 4289010291 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 48.

The spelling of 257340616860 in words is "two hundred fifty-seven billion, three hundred forty million, six hundred sixteen thousand, eight hundred sixty".