161940552 has 16 divisors (see below), whose sum is σ = 404851440. Its totient is φ = 53980176.

The previous prime is 161940551. The next prime is 161940557. The reversal of 161940552 is 255049161.

It is not an unprimeable number, because it can be changed into a prime (161940551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3373738 + ... + 3373785.

It is an arithmetic number, because the mean of its divisors is an integer number (25303215).

Almost surely, 2^161940552 is an apocalyptic number.

161940552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161940552 is an abundant number, since it is smaller than the sum of its proper divisors (242910888).

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

161940552 is a wasteful number, since it uses less digits than its factorization.

161940552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6747532 (or 6747528 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 161940552 is about 12725.5865090769. The cubic root of 161940552 is about 545.0694880957.

The spelling of 161940552 in words is "one hundred sixty-one million, nine hundred forty thousand, five hundred fifty-two".