6464674731 has 4 divisors (see below), whose sum is σ = 8619566312. Its totient is φ = 4309783152.

The previous prime is 6464674729. The next prime is 6464674757. The reversal of 6464674731 is 1374764646.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6464674731 - 2¹ = 6464674729 is a prime.

It is a super-2 number, since 2×6464674731² = 83584038755259844722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6464670731) 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, 1077445786 + ... + 1077445791.

It is an arithmetic number, because the mean of its divisors is an integer number (2154891578).

Almost surely, 2^6464674731 is an apocalyptic number.

6464674731 is a deficient number, since it is larger than the sum of its proper divisors (2154891581).

6464674731 is a wasteful number, since it uses less digits than its factorization.

6464674731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2154891580.

The product of its digits is 2032128, while the sum is 48.

The square root of 6464674731 is about 80403.2009997114. The cubic root of 6464674731 is about 1862.8686158145.

The spelling of 6464674731 in words is "six billion, four hundred sixty-four million, six hundred seventy-four thousand, seven hundred thirty-one".