165610605602 has 16 divisors (see below), whose sum is σ = 276749819640. Its totient is φ = 73799951232.

The previous prime is 165610605577. The next prime is 165610605613. The reversal of 165610605602 is 206506016561.

It can be written as a sum of positive squares in 4 ways, for example, as 115837441801 + 49773163801 = 340349^2 + 223099^2 .

It is a super-2 number, since 2×165610605602² (a number of 23 digits) contains 22 as substring.

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, 109820603 + ... + 109822110.

Almost surely, 2^165610605602 is an apocalyptic number.

165610605602 is a deficient number, since it is larger than the sum of its proper divisors (111139214038).

165610605602 is a wasteful number, since it uses less digits than its factorization.

165610605602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219642757.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 165610605602 in words is "one hundred sixty-five billion, six hundred ten million, six hundred five thousand, six hundred two".