161624466 has 12 divisors (see below), whose sum is σ = 350186382. Its totient is φ = 53874816.

The previous prime is 161624461. The next prime is 161624509. The reversal of 161624466 is 664426161.

It can be written as a sum of positive squares in only one way, i.e., 123543225 + 38081241 = 11115^2 + 6171^2 .

It is a super-2 number, since 2×161624466² = 52244936019570312, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161624466.

It is not an unprimeable number, because it can be changed into a prime (161624461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4489551 + ... + 4489586.

Almost surely, 2^161624466 is an apocalyptic number.

161624466 is an abundant number, since it is smaller than the sum of its proper divisors (188561916).

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

161624466 is a wasteful number, since it uses less digits than its factorization.

161624466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8979145 (or 8979142 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 161624466 is about 12713.1611332508. The cubic root of 161624466 is about 544.7146232012.

The spelling of 161624466 in words is "one hundred sixty-one million, six hundred twenty-four thousand, four hundred sixty-six".