161884909402 has 16 divisors (see below), whose sum is σ = 246007544832. Its totient is φ = 79888999680.

The previous prime is 161884909399. The next prime is 161884909421. The reversal of 161884909402 is 204909488161.

It is a self number, because there is not a number n which added to its sum of digits gives 161884909402.

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, 1602124 + ... + 1700167.

It is an arithmetic number, because the mean of its divisors is an integer number (15375471552).

Almost surely, 2^161884909402 is an apocalyptic number.

161884909402 is a deficient number, since it is larger than the sum of its proper divisors (84122635430).

161884909402 is a wasteful number, since it uses less digits than its factorization.

161884909402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3302613.

The product of its (nonzero) digits is 995328, while the sum is 52.

The spelling of 161884909402 in words is "one hundred sixty-one billion, eight hundred eighty-four million, nine hundred nine thousand, four hundred two".