5131644145 has 8 divisors (see below), whose sum is σ = 6324404904. Its totient is φ = 3994360704.

The previous prime is 5131644143. The next prime is 5131644151. The reversal of 5131644145 is 5414461315.

It can be written as a sum of positive squares in 4 ways, for example, as 2246665201 + 2884978944 = 47399^2 + 53712^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5131644145 - 2¹ = 5131644143 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5131644145.

It is not an unprimeable number, because it can be changed into a prime (5131644143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13869124 + ... + 13869493.

It is an arithmetic number, because the mean of its divisors is an integer number (790550613).

Almost surely, 2^5131644145 is an apocalyptic number.

It is an amenable number.

5131644145 is a deficient number, since it is larger than the sum of its proper divisors (1192760759).

5131644145 is a wasteful number, since it uses less digits than its factorization.

5131644145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27738659.

The product of its digits is 28800, while the sum is 34.

The square root of 5131644145 is about 71635.4950077125. The cubic root of 5131644145 is about 1724.8533539133.

The spelling of 5131644145 in words is "five billion, one hundred thirty-one million, six hundred forty-four thousand, one hundred forty-five".