6387631257 has 16 divisors (see below), whose sum is σ = 9736513920. Its totient is φ = 3648957312.

The previous prime is 6387631207. The next prime is 6387631259. The reversal of 6387631257 is 7521367836.

It is not a de Polignac number, because 6387631257 - 2¹² = 6387627161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6387631259) 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, 26293 + ... + 116045.

It is an arithmetic number, because the mean of its divisors is an integer number (608532120).

Almost surely, 2^6387631257 is an apocalyptic number.

It is an amenable number.

6387631257 is a deficient number, since it is larger than the sum of its proper divisors (3348882663).

6387631257 is a wasteful number, since it uses less digits than its factorization.

6387631257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93152.

The product of its digits is 1270080, while the sum is 48.

The square root of 6387631257 is about 79922.6579700650. The cubic root of 6387631257 is about 1855.4387075413.

The spelling of 6387631257 in words is "six billion, three hundred eighty-seven million, six hundred thirty-one thousand, two hundred fifty-seven".