257693435628 has 96 divisors (see below), whose sum is σ = 619810329600. Its totient is φ = 83282520384.

The previous prime is 257693435567. The next prime is 257693435669. The reversal of 257693435628 is 826534396752.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59387883 + ... + 59392221.

It is an arithmetic number, because the mean of its divisors is an integer number (6456357600).

Almost surely, 2^257693435628 is an apocalyptic number.

It is an amenable number.

257693435628 is an abundant number, since it is smaller than the sum of its proper divisors (362116893972).

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

257693435628 is a wasteful number, since it uses less digits than its factorization.

257693435628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5211 (or 5209 counting only the distinct ones).

The product of its digits is 65318400, while the sum is 60.

The spelling of 257693435628 in words is "two hundred fifty-seven billion, six hundred ninety-three million, four hundred thirty-five thousand, six hundred twenty-eight".