161626165464 has 64 divisors (see below), whose sum is σ = 408706598880. Its totient is φ = 53258240000.

The previous prime is 161626165439. The next prime is 161626165489. The reversal of 161626165464 is 464561626161.

It is an interprime number because it is at equal distance from previous prime (161626165439) and next prime (161626165489).

It is a super-2 number, since 2×161626165464² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1501774 + ... + 1605794.

Almost surely, 2^161626165464 is an apocalyptic number.

It is an amenable number.

161626165464 is an abundant number, since it is smaller than the sum of its proper divisors (247080433416).

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

161626165464 is a wasteful number, since it uses less digits than its factorization.

161626165464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104772 (or 104768 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 48.

The spelling of 161626165464 in words is "one hundred sixty-one billion, six hundred twenty-six million, one hundred sixty-five thousand, four hundred sixty-four".