15601611607 has 4 divisors (see below), whose sum is σ = 16422749080. Its totient is φ = 14780474136.

The previous prime is 15601611589. The next prime is 15601611617. The reversal of 15601611607 is 70611610651.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70611610651 = 83 ⋅850742297.

It is a cyclic number.

It is not a de Polignac number, because 15601611607 - 2⁷ = 15601611479 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 (15601611617) 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, 410568708 + ... + 410568745.

It is an arithmetic number, because the mean of its divisors is an integer number (4105687270).

Almost surely, 2^15601611607 is an apocalyptic number.

15601611607 is a deficient number, since it is larger than the sum of its proper divisors (821137473).

15601611607 is an equidigital number, since it uses as much as digits as its factorization.

15601611607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821137472.

The product of its (nonzero) digits is 7560, while the sum is 34.

The spelling of 15601611607 in words is "fifteen billion, six hundred one million, six hundred eleven thousand, six hundred seven".