161392805 has 16 divisors (see below), whose sum is σ = 221545344. Its totient is φ = 110566080.

The previous prime is 161392793. The next prime is 161392831. The reversal of 161392805 is 508293161.

161392805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161392805 - 2⁸ = 161392549 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69239 + ... + 71531.

It is an arithmetic number, because the mean of its divisors is an integer number (13846584).

Almost surely, 2^161392805 is an apocalyptic number.

It is an amenable number.

161392805 is a deficient number, since it is larger than the sum of its proper divisors (60152539).

161392805 is a wasteful number, since it uses less digits than its factorization.

161392805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4316.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 161392805 is about 12704.0467961984. The cubic root of 161392805 is about 544.4542470430.

The spelling of 161392805 in words is "one hundred sixty-one million, three hundred ninety-two thousand, eight hundred five".