15553021012 has 12 divisors (see below), whose sum is σ = 27482037856. Its totient is φ = 7701010200.

The previous prime is 15553020941. The next prime is 15553021069. The reversal of 15553021012 is 21012035551.

It is a congruent number.

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, 18874614 + ... + 18875437.

Almost surely, 2^15553021012 is an apocalyptic number.

It is an amenable number.

15553021012 is a deficient number, since it is larger than the sum of its proper divisors (11929016844).

15553021012 is a wasteful number, since it uses less digits than its factorization.

15553021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37750158 (or 37750156 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

Adding to 15553021012 its reverse (21012035551), we get a palindrome (36565056563).

The spelling of 15553021012 in words is "fifteen billion, five hundred fifty-three million, twenty-one thousand, twelve".