15779481552 has 30 divisors (see below), whose sum is σ = 44160632802. Its totient is φ = 5259827136.

The previous prime is 15779481521. The next prime is 15779481569. The reversal of 15779481552 is 25518497751.

15779481552 is a `hidden beast` number, since 1 + 5 + 7 + 7 + 9 + 4 + 81 + 552 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10494773136 + 5284708416 = 102444^2 + 72696^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54789723 + ... + 54790010.

Almost surely, 2^15779481552 is an apocalyptic number.

15779481552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15779481552 is an abundant number, since it is smaller than the sum of its proper divisors (28381151250).

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

15779481552 is a wasteful number, since it uses less digits than its factorization.

15779481552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109579747 (or 109579738 counting only the distinct ones).

The product of its digits is 3528000, while the sum is 54.

The spelling of 15779481552 in words is "fifteen billion, seven hundred seventy-nine million, four hundred eighty-one thousand, five hundred fifty-two".