161513406 has 32 divisors (see below), whose sum is σ = 374526720. Its totient is φ = 51496632.

The previous prime is 161513381. The next prime is 161513423. The reversal of 161513406 is 604315161.

161513406 is a `hidden beast` number, since 1 + 615 + 1 + 3 + 40 + 6 = 666.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

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

It is a self number, because there is not a number n which added to its sum of digits gives 161513406.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63780 + ... + 66263.

It is an arithmetic number, because the mean of its divisors is an integer number (11703960).

Almost surely, 2^161513406 is an apocalyptic number.

161513406 is an abundant number, since it is smaller than the sum of its proper divisors (213013314).

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

161513406 is a wasteful number, since it uses less digits than its factorization.

161513406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130077 (or 130071 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 161513406 is about 12708.7924682088. The cubic root of 161513406 is about 544.5898280110.

Adding to 161513406 its reverse (604315161), we get a palindrome (765828567).

The spelling of 161513406 in words is "one hundred sixty-one million, five hundred thirteen thousand, four hundred six".