161408764 has 12 divisors (see below), whose sum is σ = 308144088. Its totient is φ = 73367600.

The previous prime is 161408749. The next prime is 161408777. The reversal of 161408764 is 467804161.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1834147 + ... + 1834234.

It is an arithmetic number, because the mean of its divisors is an integer number (25678674).

Almost surely, 2^161408764 is an apocalyptic number.

It is an amenable number.

161408764 is a deficient number, since it is larger than the sum of its proper divisors (146735324).

161408764 is a wasteful number, since it uses less digits than its factorization.

161408764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3668396 (or 3668394 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 161408764 is about 12704.6748876152. The cubic root of 161408764 is about 544.4721922027.

The spelling of 161408764 in words is "one hundred sixty-one million, four hundred eight thousand, seven hundred sixty-four".