161856654 has 16 divisors (see below), whose sum is σ = 323902800. Its totient is φ = 53920640.

The previous prime is 161856637. The next prime is 161856671. The reversal of 161856654 is 456658161.

161856654 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (161856637) and next prime (161856671).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4774 + ... + 18614.

It is an arithmetic number, because the mean of its divisors is an integer number (20243925).

Almost surely, 2^161856654 is an apocalyptic number.

161856654 is an abundant number, since it is smaller than the sum of its proper divisors (162046146).

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

161856654 is a wasteful number, since it uses less digits than its factorization.

161856654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15795.

The product of its digits is 172800, while the sum is 42.

The square root of 161856654 is about 12722.2896524171. The cubic root of 161856654 is about 544.9753421496.

The spelling of 161856654 in words is "one hundred sixty-one million, eight hundred fifty-six thousand, six hundred fifty-four".