15816140008 has 16 divisors (see below), whose sum is σ = 30214796580. Its totient is φ = 7758860928.

The previous prime is 15816139981. The next prime is 15816140101. The reversal of 15816140008 is 80004161851.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14811376804 + 1004763204 = 121702^2 + 31698^2 .

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 in 3 ways as a sum of consecutive naturals, for example, 18650685 + ... + 18651532.

Almost surely, 2^15816140008 is an apocalyptic number.

It is an amenable number.

15816140008 is a deficient number, since it is larger than the sum of its proper divisors (14398656572).

15816140008 is a wasteful number, since it uses less digits than its factorization.

15816140008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37302276 (or 37302272 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 34.

The spelling of 15816140008 in words is "fifteen billion, eight hundred sixteen million, one hundred forty thousand, eight".