15636161551 has 4 divisors (see below), whose sum is σ = 15636716704. Its totient is φ = 15635606400.

The previous prime is 15636161531. The next prime is 15636161633. The reversal of 15636161551 is 15516163651.

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

It is a cyclic number.

It is not a de Polignac number, because 15636161551 - 2³³ = 7046226959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15636161531) 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, 232935 + ... + 292456.

It is an arithmetic number, because the mean of its divisors is an integer number (3909179176).

Almost surely, 2^15636161551 is an apocalyptic number.

15636161551 is a deficient number, since it is larger than the sum of its proper divisors (555153).

15636161551 is an equidigital number, since it uses as much as digits as its factorization.

15636161551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555152.

The product of its digits is 81000, while the sum is 40.

The spelling of 15636161551 in words is "fifteen billion, six hundred thirty-six million, one hundred sixty-one thousand, five hundred fifty-one".