161404765 has 8 divisors (see below), whose sum is σ = 194215680. Its totient is φ = 128770512.

The previous prime is 161404751. The next prime is 161404801. The reversal of 161404765 is 567404161.

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 161404765 - 2⁷ = 161404637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161404765.

It is a congruent number.

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, 42145 + ... + 45814.

It is an arithmetic number, because the mean of its divisors is an integer number (24276960).

Almost surely, 2^161404765 is an apocalyptic number.

It is an amenable number.

161404765 is a deficient number, since it is larger than the sum of its proper divisors (32810915).

161404765 is an equidigital number, since it uses as much as digits as its factorization.

161404765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88331.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 161404765 is about 12704.5175036284. The cubic root of 161404765 is about 544.4676956226.

The spelling of 161404765 in words is "one hundred sixty-one million, four hundred four thousand, seven hundred sixty-five".