161363438884 has 12 divisors (see below), whose sum is σ = 283597976844. Its totient is φ = 80335445504.

The previous prime is 161363438839. The next prime is 161363438903. The reversal of 161363438884 is 488834363161.

It can be written as a sum of positive squares in 2 ways, for example, as 10104672484 + 151258766400 = 100522^2 + 388920^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86567437 + ... + 86569300.

It is an arithmetic number, because the mean of its divisors is an integer number (23633164737).

Almost surely, 2^161363438884 is an apocalyptic number.

It is an amenable number.

161363438884 is a deficient number, since it is larger than the sum of its proper divisors (122234537960).

161363438884 is a wasteful number, since it uses less digits than its factorization.

161363438884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173136974 (or 173136972 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 55.

The spelling of 161363438884 in words is "one hundred sixty-one billion, three hundred sixty-three million, four hundred thirty-eight thousand, eight hundred eighty-four".