15164606123561 has 4 divisors (see below), whose sum is σ = 15334994956500. Its totient is φ = 14994217290624.

The previous prime is 15164606123519. The next prime is 15164606123567. The reversal of 15164606123561 is 16532160646151.

15164606123561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7302863069161 + 7861743054400 = 2702381^2 + 2803880^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15164606123561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15164606123567) 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, 85194416336 + ... + 85194416513.

It is an arithmetic number, because the mean of its divisors is an integer number (3833748739125).

Almost surely, 2^{15164606123561} is an apocalyptic number.

It is an amenable number.

15164606123561 is a deficient number, since it is larger than the sum of its proper divisors (170388832939).

15164606123561 is an equidigital number, since it uses as much as digits as its factorization.

15164606123561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170388832938.

The product of its (nonzero) digits is 777600, while the sum is 47.

The spelling of 15164606123561 in words is "fifteen trillion, one hundred sixty-four billion, six hundred six million, one hundred twenty-three thousand, five hundred sixty-one".