161772268 has 24 divisors (see below), whose sum is σ = 324192512. Its totient is φ = 69192144.

The previous prime is 161772239. The next prime is 161772287. The reversal of 161772268 is 862277161.

161772268 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 161772268.

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, 9121 + ... + 20167.

Almost surely, 2^161772268 is an apocalyptic number.

It is an amenable number.

161772268 is an abundant number, since it is smaller than the sum of its proper divisors (162420244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161772268 is a wasteful number, since it uses less digits than its factorization.

161772268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11581 (or 11579 counting only the distinct ones).

The product of its digits is 56448, while the sum is 40.

The square root of 161772268 is about 12718.9727572631. The cubic root of 161772268 is about 544.8806157716.

The spelling of 161772268 in words is "one hundred sixty-one million, seven hundred seventy-two thousand, two hundred sixty-eight".