8159749544 has 8 divisors (see below), whose sum is σ = 15299530410. Its totient is φ = 4079874768.

The previous prime is 8159749529. The next prime is 8159749561. The reversal of 8159749544 is 4459479518.

It can be written as a sum of positive squares in only one way, i.e., 7332496900 + 827252644 = 85630^2 + 28762^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 8159749544.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 509984339 + ... + 509984354.

Almost surely, 2^8159749544 is an apocalyptic number.

It is an amenable number.

8159749544 is a deficient number, since it is larger than the sum of its proper divisors (7139780866).

8159749544 is a wasteful number, since it uses less digits than its factorization.

8159749544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019968699 (or 1019968695 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 56.

The square root of 8159749544 is about 90331.3320171910. The cubic root of 8159749544 is about 2013.2248213035.

The spelling of 8159749544 in words is "eight billion, one hundred fifty-nine million, seven hundred forty-nine thousand, five hundred forty-four".