161610886218804 has 48 divisors (see below), whose sum is σ = 412066880406720. Its totient is φ = 48890410647040.

The previous prime is 161610886218797. The next prime is 161610886218871. The reversal of 161610886218804 is 408812688016161.

It is a super-2 number, since 2×161610886218804² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1032236139 + ... + 1032392690.

It is an arithmetic number, because the mean of its divisors is an integer number (8584726675140).

Almost surely, 2^{161610886218804} is an apocalyptic number.

It is an amenable number.

161610886218804 is an abundant number, since it is smaller than the sum of its proper divisors (250455994187916).

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

161610886218804 is a wasteful number, since it uses less digits than its factorization.

161610886218804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2064629440 (or 2064629438 counting only the distinct ones).

The product of its (nonzero) digits is 7077888, while the sum is 60.

The spelling of 161610886218804 in words is "one hundred sixty-one trillion, six hundred ten billion, eight hundred eighty-six million, two hundred eighteen thousand, eight hundred four".