5631745551 has 16 divisors (see below), whose sum is σ = 7528909824. Its totient is φ = 3744555584.

The previous prime is 5631745481. The next prime is 5631745627. The reversal of 5631745551 is 1555471365.

It is a cyclic number.

It is not a de Polignac number, because 5631745551 - 2⁷ = 5631745423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5631745051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2450635 + ... + 2452931.

It is an arithmetic number, because the mean of its divisors is an integer number (470556864).

Almost surely, 2^5631745551 is an apocalyptic number.

5631745551 is a deficient number, since it is larger than the sum of its proper divisors (1897164273).

5631745551 is a wasteful number, since it uses less digits than its factorization.

5631745551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4110.

The product of its digits is 315000, while the sum is 42.

The square root of 5631745551 is about 75044.9568658681. The cubic root of 5631745551 is about 1779.1572780410.

The spelling of 5631745551 in words is "five billion, six hundred thirty-one million, seven hundred forty-five thousand, five hundred fifty-one".