15533519916 has 12 divisors (see below), whose sum is σ = 36244879832. Its totient is φ = 5177839968.

The previous prime is 15533519879. The next prime is 15533519917. The reversal of 15533519916 is 61991533551.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (15533519917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 647229985 + ... + 647230008.

Almost surely, 2^15533519916 is an apocalyptic number.

It is an amenable number.

15533519916 is an abundant number, since it is smaller than the sum of its proper divisors (20711359916).

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

15533519916 is a wasteful number, since it uses less digits than its factorization.

15533519916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1294460000 (or 1294459998 counting only the distinct ones).

The product of its digits is 546750, while the sum is 48.

The spelling of 15533519916 in words is "fifteen billion, five hundred thirty-three million, five hundred nineteen thousand, nine hundred sixteen".