3645406431 has 16 divisors (see below), whose sum is σ = 5403448320. Its totient is φ = 2428990200.

The previous prime is 3645406403. The next prime is 3645406451. The reversal of 3645406431 is 1346045463.

3645406431 is a `hidden beast` number, since 3 + 6 + 4 + 5 + 4 + 0 + 643 + 1 = 666.

It is not a de Polignac number, because 3645406431 - 2¹⁵ = 3645373663 is a prime.

It is a super-2 number, since 2×3645406431² = 26577976094352315522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3645406451) 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 15 ways as a sum of consecutive naturals, for example, 18076 + ... + 87278.

It is an arithmetic number, because the mean of its divisors is an integer number (337715520).

Almost surely, 2^3645406431 is an apocalyptic number.

3645406431 is a deficient number, since it is larger than the sum of its proper divisors (1758041889).

3645406431 is a wasteful number, since it uses less digits than its factorization.

3645406431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71163 (or 71157 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The square root of 3645406431 is about 60377.2012517970. The cubic root of 3645406431 is about 1539.0355504785.

The spelling of 3645406431 in words is "three billion, six hundred forty-five million, four hundred six thousand, four hundred thirty-one".