257388612252 has 48 divisors (see below), whose sum is σ = 621445157760. Its totient is φ = 82816074432.

The previous prime is 257388612233. The next prime is 257388612287. The reversal of 257388612252 is 252216883752.

It is a junction number, because it is equal to n+sod(n) for n = 257388612195 and 257388612204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1264983 + ... + 1454289.

It is an arithmetic number, because the mean of its divisors is an integer number (12946774120).

Almost surely, 2^257388612252 is an apocalyptic number.

It is an amenable number.

257388612252 is an abundant number, since it is smaller than the sum of its proper divisors (364056545508).

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

257388612252 is a wasteful number, since it uses less digits than its factorization.

257388612252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193250 (or 193248 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 51.

The spelling of 257388612252 in words is "two hundred fifty-seven billion, three hundred eighty-eight million, six hundred twelve thousand, two hundred fifty-two".