161634546 has 24 divisors (see below), whose sum is σ = 358751484. Its totient is φ = 52563840.

The previous prime is 161634533. The next prime is 161634569. The reversal of 161634546 is 645436161.

It is a happy number.

161634546 is a `hidden beast` number, since 1 + 616 + 34 + 5 + 4 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 161569521 + 65025 = 12711^2 + 255^2 .

It is a super-2 number, since 2×161634546² = 52251452921252232, 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 161634546.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108771 + ... + 110246.

Almost surely, 2^161634546 is an apocalyptic number.

161634546 is an abundant number, since it is smaller than the sum of its proper divisors (197116938).

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

161634546 is a wasteful number, since it uses less digits than its factorization.

161634546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219066 (or 219063 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 161634546 is about 12713.5575666294. The cubic root of 161634546 is about 544.7259470009.

The spelling of 161634546 in words is "one hundred sixty-one million, six hundred thirty-four thousand, five hundred forty-six".