257525783250 has 32 divisors (see below), whose sum is σ = 642784356864. Its totient is φ = 68673542000.

The previous prime is 257525783227. The next prime is 257525783287. The reversal of 257525783250 is 52387525752.

It is a junction number, because it is equal to n+sod(n) for n = 257525783193 and 257525783202.

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, 171683106 + ... + 171684605.

It is an arithmetic number, because the mean of its divisors is an integer number (20087011152).

Almost surely, 2^257525783250 is an apocalyptic number.

257525783250 is an abundant number, since it is smaller than the sum of its proper divisors (385258573614).

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

257525783250 is a wasteful number, since it uses less digits than its factorization.

257525783250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343367731 (or 343367721 counting only the distinct ones).

The product of its (nonzero) digits is 5880000, while the sum is 51.

The spelling of 257525783250 in words is "two hundred fifty-seven billion, five hundred twenty-five million, seven hundred eighty-three thousand, two hundred fifty".