161915677 has 8 divisors (see below), whose sum is σ = 201868992. Its totient is φ = 126168000.

The previous prime is 161915669. The next prime is 161915681. The reversal of 161915677 is 776519161.

161915677 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 161915677 - 2³ = 161915669 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 (161915627) 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, 1051324 + ... + 1051477.

It is an arithmetic number, because the mean of its divisors is an integer number (25233624).

Almost surely, 2^161915677 is an apocalyptic number.

It is an amenable number.

161915677 is a deficient number, since it is larger than the sum of its proper divisors (39953315).

161915677 is a wasteful number, since it uses less digits than its factorization.

161915677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2102819.

The product of its digits is 79380, while the sum is 43.

The square root of 161915677 is about 12724.6091099098. The cubic root of 161915677 is about 545.0415780641.

The spelling of 161915677 in words is "one hundred sixty-one million, nine hundred fifteen thousand, six hundred seventy-seven".