161913695 has 24 divisors (see below), whose sum is σ = 208882800. Its totient is φ = 120445952.

The previous prime is 161913677. The next prime is 161913737. The reversal of 161913695 is 596319161.

It is not a de Polignac number, because 161913695 - 2⁸ = 161913439 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 127976 + ... + 129234.

It is an arithmetic number, because the mean of its divisors is an integer number (8703450).

Almost surely, 2^161913695 is an apocalyptic number.

161913695 is a deficient number, since it is larger than the sum of its proper divisors (46969105).

161913695 is a wasteful number, since it uses less digits than its factorization.

161913695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387 (or 1370 counting only the distinct ones).

The product of its digits is 43740, while the sum is 41.

The square root of 161913695 is about 12724.5312290866. The cubic root of 161913695 is about 545.0393541147.

The spelling of 161913695 in words is "one hundred sixty-one million, nine hundred thirteen thousand, six hundred ninety-five".