15055105661 has 4 divisors (see below), whose sum is σ = 15066661152. Its totient is φ = 15043550172.

The previous prime is 15055105651. The next prime is 15055105687. The reversal of 15055105661 is 16650155051.

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 15055105661 - 2²⁶ = 14987996797 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 (15055105621) 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, 5775791 + ... + 5778396.

It is an arithmetic number, because the mean of its divisors is an integer number (3766665288).

Almost surely, 2^15055105661 is an apocalyptic number.

It is an amenable number.

15055105661 is a deficient number, since it is larger than the sum of its proper divisors (11555491).

15055105661 is a wasteful number, since it uses less digits than its factorization.

15055105661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11555490.

The product of its (nonzero) digits is 22500, while the sum is 35.

The spelling of 15055105661 in words is "fifteen billion, fifty-five million, one hundred five thousand, six hundred sixty-one".