161656395 has 16 divisors (see below), whose sum is σ = 260689920. Its totient is φ = 85536864.

The previous prime is 161656387. The next prime is 161656403. The reversal of 161656395 is 593656161.

161656395 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (161656387) and next prime (161656403).

It is not a de Polignac number, because 161656395 - 2³ = 161656387 is a prime.

It is a super-2 number, since 2×161656395² = 52265580088792050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40525 + ... + 44334.

It is an arithmetic number, because the mean of its divisors is an integer number (16293120).

Almost surely, 2^161656395 is an apocalyptic number.

161656395 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161656395 is a deficient number, since it is larger than the sum of its proper divisors (99033525).

161656395 is a wasteful number, since it uses less digits than its factorization.

161656395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84994.

The product of its digits is 145800, while the sum is 42.

The square root of 161656395 is about 12714.4168171411. The cubic root of 161656395 is about 544.7504903948.

The spelling of 161656395 in words is "one hundred sixty-one million, six hundred fifty-six thousand, three hundred ninety-five".