15115612061 has 8 divisors (see below), whose sum is σ = 16511961024. Its totient is φ = 13722963520.

The previous prime is 15115612007. The next prime is 15115612079. The reversal of 15115612061 is 16021651151.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15115612061 - 2¹⁸ = 15115349917 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 (15115612361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 916556 + ... + 932901.

It is an arithmetic number, because the mean of its divisors is an integer number (2063995128).

Almost surely, 2^15115612061 is an apocalyptic number.

15115612061 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15115612061 is a deficient number, since it is larger than the sum of its proper divisors (1396348963).

15115612061 is a wasteful number, since it uses less digits than its factorization.

15115612061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850211.

The product of its (nonzero) digits is 1800, while the sum is 29.

The spelling of 15115612061 in words is "fifteen billion, one hundred fifteen million, six hundred twelve thousand, sixty-one".