5645511631 has 4 divisors (see below), whose sum is σ = 5738061064. Its totient is φ = 5552962200.

The previous prime is 5645511593. The next prime is 5645511659. The reversal of 5645511631 is 1361155465.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5645511631 is a prime.

It is a super-2 number, since 2×5645511631² = 63743603151512560322, 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 (5645511671) 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, 46274625 + ... + 46274746.

It is an arithmetic number, because the mean of its divisors is an integer number (1434515266).

Almost surely, 2^5645511631 is an apocalyptic number.

5645511631 is a deficient number, since it is larger than the sum of its proper divisors (92549433).

5645511631 is an equidigital number, since it uses as much as digits as its factorization.

5645511631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92549432.

The product of its digits is 54000, while the sum is 37.

The square root of 5645511631 is about 75136.6197735831. The cubic root of 5645511631 is about 1780.6057391139.

It can be divided in two parts, 56455 and 11631, that added together give a palindrome (68086).

The spelling of 5645511631 in words is "five billion, six hundred forty-five million, five hundred eleven thousand, six hundred thirty-one".