15665561555150 has 48 divisors (see below), whose sum is σ = 31537010148000. Its totient is φ = 5755140927360.

The previous prime is 15665561555131. The next prime is 15665561555173. The reversal of 15665561555150 is 5155516556651.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60425585 + ... + 60684284.

It is an arithmetic number, because the mean of its divisors is an integer number (657021044750).

Almost surely, 2^{15665561555150} is an apocalyptic number.

15665561555150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15665561555150 is an abundant number, since it is smaller than the sum of its proper divisors (15871448592850).

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

15665561555150 is a wasteful number, since it uses less digits than its factorization.

15665561555150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121110093 (or 121110088 counting only the distinct ones).

The product of its (nonzero) digits is 16875000, while the sum is 56.

The spelling of 15665561555150 in words is "fifteen trillion, six hundred sixty-five billion, five hundred sixty-one million, five hundred fifty-five thousand, one hundred fifty".