161602644 has 24 divisors (see below), whose sum is σ = 430940608. Its totient is φ = 46172160.

The previous prime is 161602613. The next prime is 161602667. The reversal of 161602644 is 446206161.

It is a super-2 number, since 2×161602644² = 52230829095581472, which contains 22 as substring.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 961837 + ... + 962004.

Almost surely, 2^161602644 is an apocalyptic number.

161602644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

161602644 is an abundant number, since it is smaller than the sum of its proper divisors (269337964).

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

161602644 is a wasteful number, since it uses less digits than its factorization.

161602644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1923855 (or 1923853 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 161602644 is about 12712.3028598283. The cubic root of 161602644 is about 544.6901069098.

The spelling of 161602644 in words is "one hundred sixty-one million, six hundred two thousand, six hundred forty-four".