161867665598 has 16 divisors (see below), whose sum is σ = 243862590384. Its totient is φ = 80580384000.

The previous prime is 161867665573. The next prime is 161867665607. The reversal of 161867665598 is 895566768161.

It is a super-2 number, since 2×161867665598² (a number of 23 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 7 ways as a sum of consecutive naturals, for example, 1273136 + ... + 1394492.

It is an arithmetic number, because the mean of its divisors is an integer number (15241411899).

Almost surely, 2^161867665598 is an apocalyptic number.

161867665598 is a deficient number, since it is larger than the sum of its proper divisors (81994924786).

161867665598 is a wasteful number, since it uses less digits than its factorization.

161867665598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124267.

The product of its digits is 130636800, while the sum is 68.

The spelling of 161867665598 in words is "one hundred sixty-one billion, eight hundred sixty-seven million, six hundred sixty-five thousand, five hundred ninety-eight".