161010291 has 24 divisors (see below), whose sum is σ = 239490160. Its totient is φ = 95647104.

The previous prime is 161010287. The next prime is 161010341. The reversal of 161010291 is 192010161.

161010291 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161010291 - 2² = 161010287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161010221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30345 + ... + 35253.

Almost surely, 2^161010291 is an apocalyptic number.

161010291 is a deficient number, since it is larger than the sum of its proper divisors (78479869).

161010291 is a wasteful number, since it uses less digits than its factorization.

161010291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4983 (or 4954 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 21.

The square root of 161010291 is about 12688.9830561791. The cubic root of 161010291 is about 544.0237732456.

The spelling of 161010291 in words is "one hundred sixty-one million, ten thousand, two hundred ninety-one".