15799279556 has 12 divisors (see below), whose sum is σ = 27659354940. Its totient is φ = 7896606720.

The previous prime is 15799279543. The next prime is 15799279583. The reversal of 15799279556 is 65597299751.

It can be written as a sum of positive squares in 2 ways, for example, as 2605081600 + 13194197956 = 51040^2 + 114866^2 .

It is a junction number, because it is equal to n+sod(n) for n = 15799279492 and 15799279501.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 746525 + ... + 767396.

It is an arithmetic number, because the mean of its divisors is an integer number (2304946245).

Almost surely, 2^15799279556 is an apocalyptic number.

It is an amenable number.

15799279556 is a deficient number, since it is larger than the sum of its proper divisors (11860075384).

15799279556 is a wasteful number, since it uses less digits than its factorization.

15799279556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1516534 (or 1516532 counting only the distinct ones).

The product of its digits is 53581500, while the sum is 65.

The spelling of 15799279556 in words is "fifteen billion, seven hundred ninety-nine million, two hundred seventy-nine thousand, five hundred fifty-six".