3640431651 has 16 divisors (see below), whose sum is σ = 5069815296. Its totient is φ = 2319204096.

The previous prime is 3640431601. The next prime is 3640431659. The reversal of 3640431651 is 1561340463.

3640431651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3640431651 - 2¹³ = 3640423459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3640431659) 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, 48531 + ... + 98163.

It is an arithmetic number, because the mean of its divisors is an integer number (316863456).

Almost surely, 2^3640431651 is an apocalyptic number.

3640431651 is a deficient number, since it is larger than the sum of its proper divisors (1429383645).

3640431651 is a wasteful number, since it uses less digits than its factorization.

3640431651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50722.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 3640431651 is about 60335.9896827756. The cubic root of 3640431651 is about 1538.3351394389.

The spelling of 3640431651 in words is "three billion, six hundred forty million, four hundred thirty-one thousand, six hundred fifty-one".