161562910 has 8 divisors (see below), whose sum is σ = 290813256. Its totient is φ = 64625160.

The previous prime is 161562887. The next prime is 161562977. The reversal of 161562910 is 19265161.

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

It is a super-2 number, since 2×161562910² = 52205147775336200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8078136 + ... + 8078155.

It is an arithmetic number, because the mean of its divisors is an integer number (36351657).

Almost surely, 2^161562910 is an apocalyptic number.

161562910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161562910 is a deficient number, since it is larger than the sum of its proper divisors (129250346).

161562910 is a wasteful number, since it uses less digits than its factorization.

161562910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16156298.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 161562910 is about 12710.7399469897. The cubic root of 161562910 is about 544.6454614134.

The spelling of 161562910 in words is "one hundred sixty-one million, five hundred sixty-two thousand, nine hundred ten".