3664897731 has 60 divisors (see below), whose sum is σ = 6054186600. Its totient is φ = 2207684160.

The previous prime is 3664897729. The next prime is 3664897741. The reversal of 3664897731 is 1377984663.

3664897731 is a `hidden beast` number, since 3 + 66 + 489 + 77 + 31 = 666.

It is not a de Polignac number, because 3664897731 - 2¹ = 3664897729 is a prime.

It is a super-2 number, since 2×3664897731² = 26862950757377896722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3664897741) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 1753335 + ... + 1755423.

It is an arithmetic number, because the mean of its divisors is an integer number (100903110).

Almost surely, 2^3664897731 is an apocalyptic number.

3664897731 is a deficient number, since it is larger than the sum of its proper divisors (2389288869).

3664897731 is a wasteful number, since it uses less digits than its factorization.

3664897731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2302 (or 2282 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 54.

The square root of 3664897731 is about 60538.3988143063. The cubic root of 3664897731 is about 1541.7736537365.

The spelling of 3664897731 in words is "three billion, six hundred sixty-four million, eight hundred ninety-seven thousand, seven hundred thirty-one".