161624612 has 6 divisors (see below), whose sum is σ = 282843078. Its totient is φ = 80812304.

The previous prime is 161624597. The next prime is 161624629. The reversal of 161624612 is 216426161.

It can be written as a sum of positive squares in only one way, i.e., 135163876 + 26460736 = 11626^2 + 5144^2 .

It is a super-2 number, since 2×161624612² = 52245030408301088, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20203073 + ... + 20203080.

It is an arithmetic number, because the mean of its divisors is an integer number (47140513).

Almost surely, 2^161624612 is an apocalyptic number.

It is an amenable number.

161624612 is a deficient number, since it is larger than the sum of its proper divisors (121218466).

161624612 is a wasteful number, since it uses less digits than its factorization.

161624612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40406157 (or 40406155 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 161624612 is about 12713.1668753305. The cubic root of 161624612 is about 544.7147872199.

The spelling of 161624612 in words is "one hundred sixty-one million, six hundred twenty-four thousand, six hundred twelve".