5645315631 has 4 divisors (see below), whose sum is σ = 7527087512. Its totient is φ = 3763543752.

The previous prime is 5645315603. The next prime is 5645315693. The reversal of 5645315631 is 1365135465.

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

It is not a de Polignac number, because 5645315631 - 2⁷ = 5645315503 is a prime.

It is a super-2 number, since 2×5645315631² = 63739177147225856322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5645315631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5645316631) 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, 940885936 + ... + 940885941.

It is an arithmetic number, because the mean of its divisors is an integer number (1881771878).

Almost surely, 2^5645315631 is an apocalyptic number.

5645315631 is a deficient number, since it is larger than the sum of its proper divisors (1881771881).

5645315631 is a wasteful number, since it uses less digits than its factorization.

5645315631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1881771880.

The product of its digits is 162000, while the sum is 39.

The square root of 5645315631 is about 75135.3154714878. The cubic root of 5645315631 is about 1780.5851326105.

The spelling of 5645315631 in words is "five billion, six hundred forty-five million, three hundred fifteen thousand, six hundred thirty-one".