161218486 has 32 divisors (see below), whose sum is σ = 288794016. Its totient is φ = 66528000.

The previous prime is 161218469. The next prime is 161218487. The reversal of 161218486 is 684812161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161218487) 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, 12826 + ... + 22066.

It is an arithmetic number, because the mean of its divisors is an integer number (9024813).

Almost surely, 2^161218486 is an apocalyptic number.

161218486 is a deficient number, since it is larger than the sum of its proper divisors (127575530).

161218486 is a wasteful number, since it uses less digits than its factorization.

161218486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9328.

The product of its digits is 18432, while the sum is 37.

The square root of 161218486 is about 12697.1841760290. The cubic root of 161218486 is about 544.2581562891.

The spelling of 161218486 in words is "one hundred sixty-one million, two hundred eighteen thousand, four hundred eighty-six".