161201788 has 24 divisors (see below), whose sum is σ = 310109184. Its totient is φ = 72711600.

The previous prime is 161201773. The next prime is 161201819. The reversal of 161201788 is 887102161.

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, 8220 + ... + 19747.

It is an arithmetic number, because the mean of its divisors is an integer number (12921216).

Almost surely, 2^161201788 is an apocalyptic number.

It is an amenable number.

161201788 is a deficient number, since it is larger than the sum of its proper divisors (148907396).

161201788 is a wasteful number, since it uses less digits than its factorization.

161201788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28113 (or 28111 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 34.

The square root of 161201788 is about 12696.5266116367. The cubic root of 161201788 is about 544.2393653578.

The spelling of 161201788 in words is "one hundred sixty-one million, two hundred one thousand, seven hundred eighty-eight".