161861082 has 16 divisors (see below), whose sum is σ = 323848800. Its totient is φ = 53932592.

The previous prime is 161861081. The next prime is 161861083. The reversal of 161861082 is 280168161.

It is an interprime number because it is at equal distance from previous prime (161861081) and next prime (161861083).

It is not an unprimeable number, because it can be changed into a prime (161861081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22993 + ... + 29195.

It is an arithmetic number, because the mean of its divisors is an integer number (20240550).

Almost surely, 2^161861082 is an apocalyptic number.

161861082 is an abundant number, since it is smaller than the sum of its proper divisors (161987718).

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

161861082 is a wasteful number, since it uses less digits than its factorization.

161861082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10557.

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 161861082 is about 12722.4636765054. The cubic root of 161861082 is about 544.9803118326.

The spelling of 161861082 in words is "one hundred sixty-one million, eight hundred sixty-one thousand, eighty-two".