161678292 has 12 divisors (see below), whose sum is σ = 377249376. Its totient is φ = 53892760.

The previous prime is 161678291. The next prime is 161678311. The reversal of 161678292 is 292876161.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×161678292² = 52279740208074528, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161678291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6736584 + ... + 6736607.

It is an arithmetic number, because the mean of its divisors is an integer number (31437448).

Almost surely, 2^161678292 is an apocalyptic number.

161678292 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161678292 is an abundant number, since it is smaller than the sum of its proper divisors (215571084).

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

161678292 is a wasteful number, since it uses less digits than its factorization.

161678292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13473198 (or 13473196 counting only the distinct ones).

The product of its digits is 72576, while the sum is 42.

The square root of 161678292 is about 12715.2778970811. The cubic root of 161678292 is about 544.7750854893.

The spelling of 161678292 in words is "one hundred sixty-one million, six hundred seventy-eight thousand, two hundred ninety-two".