161902868 has 12 divisors (see below), whose sum is σ = 284243232. Its totient is φ = 80690520.

The previous prime is 161902859. The next prime is 161902879. The reversal of 161902868 is 868209161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63830 + ... + 66317.

It is an arithmetic number, because the mean of its divisors is an integer number (23686936).

Almost surely, 2^161902868 is an apocalyptic number.

It is an amenable number.

161902868 is a deficient number, since it is larger than the sum of its proper divisors (122340364).

161902868 is a wasteful number, since it uses less digits than its factorization.

161902868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130462 (or 130460 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 161902868 is about 12724.1057839048. The cubic root of 161902868 is about 545.0272051061.

The spelling of 161902868 in words is "one hundred sixty-one million, nine hundred two thousand, eight hundred sixty-eight".