5257781631 has 32 divisors (see below), whose sum is σ = 8354016000. Its totient is φ = 3258032544.

The previous prime is 5257781579. The next prime is 5257781647. The reversal of 5257781631 is 1361877525.

It is a happy number.

5257781631 is a `hidden beast` number, since 5 + 2 + 5 + 7 + 7 + 8 + 1 + 631 = 666.

It is not a de Polignac number, because 5257781631 - 2¹³ = 5257773439 is a prime.

It is a super-2 number, since 2×5257781631² = 55288535358562040322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5257781231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69501 + ... + 123878.

It is an arithmetic number, because the mean of its divisors is an integer number (261063000).

Almost surely, 2^5257781631 is an apocalyptic number.

5257781631 is a deficient number, since it is larger than the sum of its proper divisors (3096234369).

5257781631 is a wasteful number, since it uses less digits than its factorization.

5257781631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193460 (or 193454 counting only the distinct ones).

The product of its digits is 352800, while the sum is 45.

The square root of 5257781631 is about 72510.5622030336. The cubic root of 5257781631 is about 1738.8716019183.

The spelling of 5257781631 in words is "five billion, two hundred fifty-seven million, seven hundred eighty-one thousand, six hundred thirty-one".