161171667616 has 48 divisors (see below), whose sum is σ = 320479286400. Its totient is φ = 79780555008.

The previous prime is 161171667571. The next prime is 161171667637. The reversal of 161171667616 is 616766171161.

It is a self number, because there is not a number n which added to its sum of digits gives 161171667616.

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, 21318045 + ... + 21325603.

It is an arithmetic number, because the mean of its divisors is an integer number (6676651800).

Almost surely, 2^161171667616 is an apocalyptic number.

161171667616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161171667616 is a deficient number, since it is larger than the sum of its proper divisors (159307618784).

161171667616 is a wasteful number, since it uses less digits than its factorization.

161171667616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14141 (or 14133 counting only the distinct ones).

The product of its digits is 381024, while the sum is 49.

The spelling of 161171667616 in words is "one hundred sixty-one billion, one hundred seventy-one million, six hundred sixty-seven thousand, six hundred sixteen".