5131644345 has 24 divisors (see below), whose sum is σ = 8901851400. Its totient is φ = 2734722816.

The previous prime is 5131644341. The next prime is 5131644389. The reversal of 5131644345 is 5434461315.

5131644345 is a `hidden beast` number, since 5 + 1 + 3 + 1 + 644 + 3 + 4 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2406491136 + 2725153209 = 49056^2 + 52203^2 .

It is not a de Polignac number, because 5131644345 - 2² = 5131644341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5131644341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13771 + ... + 102239.

It is an arithmetic number, because the mean of its divisors is an integer number (370910475).

Almost surely, 2^5131644345 is an apocalyptic number.

It is an amenable number.

5131644345 is a deficient number, since it is larger than the sum of its proper divisors (3770207055).

5131644345 is a wasteful number, since it uses less digits than its factorization.

5131644345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89769 (or 89766 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 5131644345 is about 71635.4964036685. The cubic root of 5131644345 is about 1724.8533763213.

The spelling of 5131644345 in words is "five billion, one hundred thirty-one million, six hundred forty-four thousand, three hundred forty-five".