5156661645 has 24 divisors (see below), whose sum is σ = 9008603136. Its totient is φ = 2728561248.

The previous prime is 5156661641. The next prime is 5156661647. The reversal of 5156661645 is 5461666515.

It is not a de Polignac number, because 5156661645 - 2² = 5156661641 is a prime.

It is a super-3 number, since 3×5156661645³ (a number of 30 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 5156661645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5156661641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 445437 + ... + 456866.

It is an arithmetic number, because the mean of its divisors is an integer number (375358464).

Almost surely, 2^5156661645 is an apocalyptic number.

It is an amenable number.

5156661645 is a deficient number, since it is larger than the sum of its proper divisors (3851941491).

5156661645 is a wasteful number, since it uses less digits than its factorization.

5156661645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902441 (or 902438 counting only the distinct ones).

The product of its digits is 648000, while the sum is 45.

The square root of 5156661645 is about 71809.8993523873. The cubic root of 5156661645 is about 1727.6517802781.

The spelling of 5156661645 in words is "five billion, one hundred fifty-six million, six hundred sixty-one thousand, six hundred forty-five".