3651631551 has 10 divisors (see below), whose sum is σ = 5454906512. Its totient is φ = 2434420980.

The previous prime is 3651631549. The next prime is 3651631561. The reversal of 3651631551 is 1551361563.

3651631551 is a `hidden beast` number, since 3 + 65 + 16 + 31 + 551 = 666.

It is not a de Polignac number, because 3651631551 - 2¹ = 3651631549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3651631561) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 22540855 + ... + 22541016.

Almost surely, 2^3651631551 is an apocalyptic number.

3651631551 is a deficient number, since it is larger than the sum of its proper divisors (1803274961).

3651631551 is an equidigital number, since it uses as much as digits as its factorization.

3651631551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45081883 (or 45081874 counting only the distinct ones).

The product of its digits is 40500, while the sum is 36.

The square root of 3651631551 is about 60428.7311715214. The cubic root of 3651631551 is about 1539.9111028406.

The spelling of 3651631551 in words is "three billion, six hundred fifty-one million, six hundred thirty-one thousand, five hundred fifty-one".