15166106561997 has 12 divisors (see below), whose sum is σ = 22661998311420. Its totient is φ = 9762091579968.

The previous prime is 15166106561927. The next prime is 15166106562029. The reversal of 15166106561997 is 79916560166151.

It is a happy number.

15166106561997 is a `hidden beast` number, since 1 + 5 + 1 + 6 + 6 + 1 + 0 + 6 + 5 + 619 + 9 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12150167232681 + 3015939329316 = 3485709^2 + 1736646^2 .

It is not a de Polignac number, because 15166106561997 - 2¹¹ = 15166106559949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15166106561917) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29053843728 + ... + 29053844249.

It is an arithmetic number, because the mean of its divisors is an integer number (1888499859285).

Almost surely, 2^{15166106561997} is an apocalyptic number.

It is an amenable number.

15166106561997 is a deficient number, since it is larger than the sum of its proper divisors (7495891749423).

15166106561997 is a wasteful number, since it uses less digits than its factorization.

15166106561997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58107688012 (or 58107688009 counting only the distinct ones).

The product of its (nonzero) digits is 18370800, while the sum is 63.

The spelling of 15166106561997 in words is "fifteen trillion, one hundred sixty-six billion, one hundred six million, five hundred sixty-one thousand, nine hundred ninety-seven".