15061161661 has 16 divisors (see below), whose sum is σ = 19512438400. Its totient is φ = 11289336768.

The previous prime is 15061161653. The next prime is 15061161671. The reversal of 15061161661 is 16616116051.

It is a cyclic number.

It is not a de Polignac number, because 15061161661 - 2³ = 15061161653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15061161601) 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 15 ways as a sum of consecutive naturals, for example, 4353726 + ... + 4357183.

It is an arithmetic number, because the mean of its divisors is an integer number (1219527400).

Almost surely, 2^15061161661 is an apocalyptic number.

It is an amenable number.

15061161661 is a deficient number, since it is larger than the sum of its proper divisors (4451276739).

15061161661 is a wasteful number, since it uses less digits than its factorization.

15061161661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8710948.

The product of its (nonzero) digits is 6480, while the sum is 34.

The spelling of 15061161661 in words is "fifteen billion, sixty-one million, one hundred sixty-one thousand, six hundred sixty-one".