257563153250 has 32 divisors (see below), whose sum is σ = 519247323504. Its totient is φ = 95100240000.

The previous prime is 257563153231. The next prime is 257563153259. The reversal of 257563153250 is 52351365752.

It can be written as a sum of positive squares in 8 ways, for example, as 16883623969 + 240679529281 = 129937^2 + 490591^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (257563153259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39621851 + ... + 39628350.

Almost surely, 2^257563153250 is an apocalyptic number.

257563153250 is an abundant number, since it is smaller than the sum of its proper divisors (261684170254).

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

257563153250 is a wasteful number, since it uses less digits than its factorization.

257563153250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79250231 (or 79250221 counting only the distinct ones).

The product of its (nonzero) digits is 945000, while the sum is 44.

The spelling of 257563153250 in words is "two hundred fifty-seven billion, five hundred sixty-three million, one hundred fifty-three thousand, two hundred fifty".