15523612121361 has 16 divisors (see below), whose sum is σ = 20888336268800. Its totient is φ = 10253984047488.

The previous prime is 15523612121359. The next prime is 15523612121429. The reversal of 15523612121361 is 16312121632551.

It is not a de Polignac number, because 15523612121361 - 2¹ = 15523612121359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15523612121761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25958205 + ... + 26549493.

It is an arithmetic number, because the mean of its divisors is an integer number (1305521016800).

Almost surely, 2^{15523612121361} is an apocalyptic number.

It is an amenable number.

15523612121361 is a deficient number, since it is larger than the sum of its proper divisors (5364724147439).

15523612121361 is a wasteful number, since it uses less digits than its factorization.

15523612121361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671688.

The product of its digits is 64800, while the sum is 39.

The spelling of 15523612121361 in words is "fifteen trillion, five hundred twenty-three billion, six hundred twelve million, one hundred twenty-one thousand, three hundred sixty-one".