161562602 has 4 divisors (see below), whose sum is σ = 242343906. Its totient is φ = 80781300.

The previous prime is 161562589. The next prime is 161562659. The reversal of 161562602 is 206265161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 206265161 = 421 ⋅489941.

It can be written as a sum of positive squares in only one way, i.e., 84842521 + 76720081 = 9211^2 + 8759^2 .

It is a super-2 number, since 2×161562602² = 52204948730020808, 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, 40390649 + ... + 40390652.

Almost surely, 2^161562602 is an apocalyptic number.

161562602 is a deficient number, since it is larger than the sum of its proper divisors (80781304).

161562602 is an equidigital number, since it uses as much as digits as its factorization.

161562602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80781303.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 161562602 is about 12710.7278312455. The cubic root of 161562602 is about 544.6451153131.

The spelling of 161562602 in words is "one hundred sixty-one million, five hundred sixty-two thousand, six hundred two".