161207764 has 12 divisors (see below), whose sum is σ = 282852864. Its totient is φ = 80392664.

The previous prime is 161207741. The next prime is 161207771. The reversal of 161207764 is 467702161.

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, 51082 + ... + 54145.

It is an arithmetic number, because the mean of its divisors is an integer number (23571072).

Almost surely, 2^161207764 is an apocalyptic number.

It is an amenable number.

161207764 is a deficient number, since it is larger than the sum of its proper divisors (121645100).

161207764 is a wasteful number, since it uses less digits than its factorization.

161207764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105614 (or 105612 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 161207764 is about 12696.7619494106. The cubic root of 161207764 is about 544.2460905402.

The spelling of 161207764 in words is "one hundred sixty-one million, two hundred seven thousand, seven hundred sixty-four".