257563632 has 20 divisors (see below), whose sum is σ = 665372840. Its totient is φ = 85854528.

The previous prime is 257563627. The next prime is 257563633. The reversal of 257563632 is 236365752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257563633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2682907 + ... + 2683002.

It is an arithmetic number, because the mean of its divisors is an integer number (33268642).

Almost surely, 2^257563632 is an apocalyptic number.

It is an amenable number.

257563632 is an abundant number, since it is smaller than the sum of its proper divisors (407809208).

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

257563632 is a wasteful number, since it uses less digits than its factorization.

257563632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5365920 (or 5365914 counting only the distinct ones).

The product of its digits is 226800, while the sum is 39.

The square root of 257563632 is about 16048.7891132010. The cubic root of 257563632 is about 636.2505638257.

It can be divided in two parts, 25 and 7563632, that added together give a palindrome (7563657).

The spelling of 257563632 in words is "two hundred fifty-seven million, five hundred sixty-three thousand, six hundred thirty-two".