161618082466 has 16 divisors (see below), whose sum is σ = 244031905656. Its totient is φ = 80274370176.

The previous prime is 161618082449. The next prime is 161618082481. The reversal of 161618082466 is 664280816161.

It can be written as a sum of positive squares in 4 ways, for example, as 68131962441 + 93486120025 = 261021^2 + 305755^2 .

It is a super-2 number, since 2×161618082466² (a number of 23 digits) contains 22 as substring.

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, 1243390 + ... + 1367206.

Almost surely, 2^161618082466 is an apocalyptic number.

161618082466 is a deficient number, since it is larger than the sum of its proper divisors (82413823190).

161618082466 is a wasteful number, since it uses less digits than its factorization.

161618082466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128133.

The product of its (nonzero) digits is 663552, while the sum is 49.

The spelling of 161618082466 in words is "one hundred sixty-one billion, six hundred eighteen million, eighty-two thousand, four hundred sixty-six".