161884909393 has 8 divisors (see below), whose sum is σ = 172268899200. Its totient is φ = 151596624960.

The previous prime is 161884909313. The next prime is 161884909399. The reversal of 161884909393 is 393909488161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161884909393 - 2⁹ = 161884908881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161884909399) 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, 23922853 + ... + 23929618.

It is an arithmetic number, because the mean of its divisors is an integer number (21533612400).

Almost surely, 2^161884909393 is an apocalyptic number.

It is an amenable number.

161884909393 is a deficient number, since it is larger than the sum of its proper divisors (10383989807).

161884909393 is a wasteful number, since it uses less digits than its factorization.

161884909393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47852687.

The product of its (nonzero) digits is 10077696, while the sum is 61.

The spelling of 161884909393 in words is "one hundred sixty-one billion, eight hundred eighty-four million, nine hundred nine thousand, three hundred ninety-three".