161696904 has 16 divisors (see below), whose sum is σ = 404242320. Its totient is φ = 53898960.

The previous prime is 161696903. The next prime is 161696921. The reversal of 161696904 is 409696161.

It is a super-2 number, since 2×161696904² = 52291777526370432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161696903) by changing a digit.

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, 3368662 + ... + 3368709.

It is an arithmetic number, because the mean of its divisors is an integer number (25265145).

Almost surely, 2^161696904 is an apocalyptic number.

It is an amenable number.

161696904 is an abundant number, since it is smaller than the sum of its proper divisors (242545416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161696904 is a wasteful number, since it uses less digits than its factorization.

161696904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6737380 (or 6737376 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 161696904 is about 12716.0097514904. The cubic root of 161696904 is about 544.7959890683.

The spelling of 161696904 in words is "one hundred sixty-one million, six hundred ninety-six thousand, nine hundred four".