161697696986 has 16 divisors (see below), whose sum is σ = 277202089536. Its totient is φ = 69297503616.

The previous prime is 161697696977. The next prime is 161697697003. The reversal of 161697696986 is 689696796161.

It is a super-2 number, since 2×161697696986² (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 7 ways as a sum of consecutive naturals, for example, 750410 + ... + 941546.

It is an arithmetic number, because the mean of its divisors is an integer number (17325130596).

Almost surely, 2^161697696986 is an apocalyptic number.

161697696986 is a deficient number, since it is larger than the sum of its proper divisors (115504392550).

161697696986 is a wasteful number, since it uses less digits than its factorization.

161697696986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251573.

The product of its digits is 317447424, while the sum is 74.

The spelling of 161697696986 in words is "one hundred sixty-one billion, six hundred ninety-seven million, six hundred ninety-six thousand, nine hundred eighty-six".