161858652 has 24 divisors (see below), whose sum is σ = 386882832. Its totient is φ = 52636800.

The previous prime is 161858651. The next prime is 161858677. The reversal of 161858652 is 256858161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161858651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163999 + ... + 164982.

It is an arithmetic number, because the mean of its divisors is an integer number (16120118).

Almost surely, 2^161858652 is an apocalyptic number.

161858652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161858652 is an abundant number, since it is smaller than the sum of its proper divisors (225024180).

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

161858652 is a wasteful number, since it uses less digits than its factorization.

161858652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329029 (or 329027 counting only the distinct ones).

The product of its digits is 115200, while the sum is 42.

The square root of 161858652 is about 12722.3681757761. The cubic root of 161858652 is about 544.9775845787.

The spelling of 161858652 in words is "one hundred sixty-one million, eight hundred fifty-eight thousand, six hundred fifty-two".