161654866088 has 16 divisors (see below), whose sum is σ = 303108844500. Its totient is φ = 80825840896.

The previous prime is 161654865973. The next prime is 161654866111. The reversal of 161654866088 is 880668456161.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 151615226884 + 10039639204 = 389378^2 + 100198^2 .

It is a super-2 number, since 2×161654866088² (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 3 ways as a sum of consecutive naturals, for example, 308678 + ... + 646986.

Almost surely, 2^161654866088 is an apocalyptic number.

It is an amenable number.

161654866088 is a deficient number, since it is larger than the sum of its proper divisors (141453978412).

161654866088 is a wasteful number, since it uses less digits than its factorization.

161654866088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398044 (or 398040 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 59.

The spelling of 161654866088 in words is "one hundred sixty-one billion, six hundred fifty-four million, eight hundred sixty-six thousand, eighty-eight".