161165438088 has 32 divisors (see below), whose sum is σ = 403536375360. Its totient is φ = 53638775360.

The previous prime is 161165438051. The next prime is 161165438141. The reversal of 161165438088 is 880834561161.

It is a super-2 number, since 2×161165438088² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161165438088.

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, 5173983 + ... + 5205038.

It is an arithmetic number, because the mean of its divisors is an integer number (12610511730).

Almost surely, 2^161165438088 is an apocalyptic number.

It is an amenable number.

161165438088 is an abundant number, since it is smaller than the sum of its proper divisors (242370937272).

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

161165438088 is a wasteful number, since it uses less digits than its factorization.

161165438088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10379677 (or 10379673 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 51.

The spelling of 161165438088 in words is "one hundred sixty-one billion, one hundred sixty-five million, four hundred thirty-eight thousand, eighty-eight".