161870711 has 16 divisors (see below), whose sum is σ = 172378560. Its totient is φ = 151683840.

The previous prime is 161870707. The next prime is 161870713. The reversal of 161870711 is 117078161.

It is a cyclic number.

It is not a de Polignac number, because 161870711 - 2² = 161870707 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161870713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 384281 + ... + 384701.

It is an arithmetic number, because the mean of its divisors is an integer number (10773660).

Almost surely, 2^161870711 is an apocalyptic number.

161870711 is a deficient number, since it is larger than the sum of its proper divisors (10507849).

161870711 is a wasteful number, since it uses less digits than its factorization.

161870711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746.

The product of its (nonzero) digits is 2352, while the sum is 32.

The square root of 161870711 is about 12722.8420960098. The cubic root of 161870711 is about 544.9911184480.

The spelling of 161870711 in words is "one hundred sixty-one million, eight hundred seventy thousand, seven hundred eleven".