161518494 has 16 divisors (see below), whose sum is σ = 333457920. Its totient is φ = 52102680.

The previous prime is 161518477. The next prime is 161518501. The reversal of 161518494 is 494815161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 434004 + ... + 434375.

It is an arithmetic number, because the mean of its divisors is an integer number (20841120).

Almost surely, 2^161518494 is an apocalyptic number.

161518494 is an abundant number, since it is smaller than the sum of its proper divisors (171939426).

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

161518494 is a wasteful number, since it uses less digits than its factorization.

161518494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868415.

The product of its digits is 34560, while the sum is 39.

The square root of 161518494 is about 12708.9926430068. The cubic root of 161518494 is about 544.5955465124.

The spelling of 161518494 in words is "one hundred sixty-one million, five hundred eighteen thousand, four hundred ninety-four".