161623692 has 36 divisors (see below), whose sum is σ = 432582696. Its totient is φ = 50705280.

The previous prime is 161623687. The next prime is 161623711. The reversal of 161623692 is 296326161.

It is a happy number.

161623692 is a `hidden beast` number, since 1 + 616 + 2 + 36 + 9 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×161623692² = 52244435631421728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 131434 + ... + 132657.

It is an arithmetic number, because the mean of its divisors is an integer number (12016186).

Almost surely, 2^161623692 is an apocalyptic number.

161623692 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161623692 is an abundant number, since it is smaller than the sum of its proper divisors (270959004).

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

161623692 is a wasteful number, since it uses less digits than its factorization.

161623692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264118 (or 264113 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 161623692 is about 12713.1306923197. The cubic root of 161623692 is about 544.7137536756.

The spelling of 161623692 in words is "one hundred sixty-one million, six hundred twenty-three thousand, six hundred ninety-two".