15115660601 has 4 divisors (see below), whose sum is σ = 15211938852. Its totient is φ = 15019382352.

The previous prime is 15115660591. The next prime is 15115660603. The reversal of 15115660601 is 10606651151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10606651151 = 32707 ⋅324293.

It can be written as a sum of positive squares in 2 ways, for example, as 1485331600 + 13630329001 = 38540^2 + 116749^2 .

It is a cyclic number.

It is not a de Polignac number, because 15115660601 - 2¹⁸ = 15115398457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (15115660603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48138890 + ... + 48139203.

It is an arithmetic number, because the mean of its divisors is an integer number (3802984713).

Almost surely, 2^15115660601 is an apocalyptic number.

It is an amenable number.

15115660601 is a deficient number, since it is larger than the sum of its proper divisors (96278251).

15115660601 is an equidigital number, since it uses as much as digits as its factorization.

15115660601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96278250.

The product of its (nonzero) digits is 5400, while the sum is 32.

The spelling of 15115660601 in words is "fifteen billion, one hundred fifteen million, six hundred sixty thousand, six hundred one".