15180013997 has 4 divisors (see below), whose sum is σ = 15180902880. Its totient is φ = 15179125116.

The previous prime is 15180013969. The next prime is 15180014009. The reversal of 15180013997 is 79931008151.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15180013997 - 2¹⁰ = 15180012973 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 (15180013097) 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, 418313 + ... + 453150.

It is an arithmetic number, because the mean of its divisors is an integer number (3795225720).

Almost surely, 2^15180013997 is an apocalyptic number.

It is an amenable number.

15180013997 is a deficient number, since it is larger than the sum of its proper divisors (888883).

15180013997 is an equidigital number, since it uses as much as digits as its factorization.

15180013997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888882.

The product of its (nonzero) digits is 68040, while the sum is 44.

The spelling of 15180013997 in words is "fifteen billion, one hundred eighty million, thirteen thousand, nine hundred ninety-seven".