161611650660615 has 8 divisors (see below), whose sum is σ = 258578641057008. Its totient is φ = 86192880352320.

The previous prime is 161611650660587. The next prime is 161611650660617. The reversal of 161611650660615 is 516066056116161.

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

It is not a de Polignac number, because 161611650660615 - 2¹³ = 161611650652423 is a prime.

It is a super-2 number, since 2×161611650660615² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161611650660617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5387055022006 + ... + 5387055022035.

It is an arithmetic number, because the mean of its divisors is an integer number (32322330132126).

Almost surely, 2^{161611650660615} is an apocalyptic number.

161611650660615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161611650660615 is a deficient number, since it is larger than the sum of its proper divisors (96966990396393).

161611650660615 is a wasteful number, since it uses less digits than its factorization.

161611650660615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10774110044049.

The product of its (nonzero) digits is 1166400, while the sum is 51.

The spelling of 161611650660615 in words is "one hundred sixty-one trillion, six hundred eleven billion, six hundred fifty million, six hundred sixty thousand, six hundred fifteen".