15699579672 has 128 divisors (see below), whose sum is σ = 46055116800. Its totient is φ = 4366389888.

The previous prime is 15699579661. The next prime is 15699579677. The reversal of 15699579672 is 27697599651.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15699579677) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2214229 + ... + 2221307.

It is an arithmetic number, because the mean of its divisors is an integer number (359805600).

Almost surely, 2^15699579672 is an apocalyptic number.

15699579672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15699579672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23027558400).

15699579672 is an abundant number, since it is smaller than the sum of its proper divisors (30355537128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15699579672 is a wasteful number, since it uses less digits than its factorization.

15699579672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7445 (or 7441 counting only the distinct ones).

The product of its digits is 64297800, while the sum is 66.

The spelling of 15699579672 in words is "fifteen billion, six hundred ninety-nine million, five hundred seventy-nine thousand, six hundred seventy-two".