161430624 has 48 divisors (see below), whose sum is σ = 470841840. Its totient is φ = 53809920.

The previous prime is 161430587. The next prime is 161430637. The reversal of 161430624 is 426034161.

161430624 is a `hidden beast` number, since 1 + 6 + 1 + 4 + 30 + 624 = 666.

161430624 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92557 + ... + 94284.

It is an arithmetic number, because the mean of its divisors is an integer number (9809205).

Almost surely, 2^161430624 is an apocalyptic number.

It is an amenable number.

161430624 is an abundant number, since it is smaller than the sum of its proper divisors (309411216).

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

161430624 is a wasteful number, since it uses less digits than its factorization.

161430624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186860 (or 186846 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 161430624 is about 12705.5351717273. The cubic root of 161430624 is about 544.4967708450.

Adding to 161430624 its reverse (426034161), we get a palindrome (587464785).

The spelling of 161430624 in words is "one hundred sixty-one million, four hundred thirty thousand, six hundred twenty-four".