5156561631 has 12 divisors (see below), whose sum is σ = 7444977288. Its totient is φ = 3173268384.

The previous prime is 5156561623. The next prime is 5156561633. The reversal of 5156561631 is 1361656515.

5156561631 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 5156561631 - 2³ = 5156561623 is a prime.

It is a super-2 number, since 2×5156561631² = 53180255708602760322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 5156561631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5156561633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5084860 + ... + 5085873.

It is an arithmetic number, because the mean of its divisors is an integer number (620414774).

Almost surely, 2^5156561631 is an apocalyptic number.

5156561631 is a deficient number, since it is larger than the sum of its proper divisors (2288415657).

5156561631 is a wasteful number, since it uses less digits than its factorization.

5156561631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10170762 (or 10170749 counting only the distinct ones).

The product of its digits is 81000, while the sum is 39.

The square root of 5156561631 is about 71809.2029687003. The cubic root of 5156561631 is about 1727.6406108760.

The spelling of 5156561631 in words is "five billion, one hundred fifty-six million, five hundred sixty-one thousand, six hundred thirty-one".