3645145431 has 6 divisors (see below), whose sum is σ = 5265210080. Its totient is φ = 2430096948.

The previous prime is 3645145417. The next prime is 3645145477. The reversal of 3645145431 is 1345415463.

3645145431 is a `hidden beast` number, since 3 + 64 + 51 + 4 + 543 + 1 = 666.

It is not a de Polignac number, because 3645145431 - 2⁶ = 3645145367 is a prime.

It is a super-2 number, since 2×3645145431² = 26574170426280351522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3645145411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 202508071 + ... + 202508088.

Almost surely, 2^3645145431 is an apocalyptic number.

3645145431 is a deficient number, since it is larger than the sum of its proper divisors (1620064649).

3645145431 is a wasteful number, since it uses less digits than its factorization.

3645145431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405016165 (or 405016162 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 3645145431 is about 60375.0398012291. The cubic root of 3645145431 is about 1538.9988195156.

The spelling of 3645145431 in words is "three billion, six hundred forty-five million, one hundred forty-five thousand, four hundred thirty-one".