161825672816 has 20 divisors (see below), whose sum is σ = 313546150512. Its totient is φ = 80910537216.

The previous prime is 161825672807. The next prime is 161825672819. The reversal of 161825672816 is 618276528161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161825672819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 533741 + ... + 780083.

Almost surely, 2^161825672816 is an apocalyptic number.

161825672816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161825672816 is a deficient number, since it is larger than the sum of its proper divisors (151720477696).

161825672816 is a wasteful number, since it uses less digits than its factorization.

161825672816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287408 (or 287402 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 53.

The spelling of 161825672816 in words is "one hundred sixty-one billion, eight hundred twenty-five million, six hundred seventy-two thousand, eight hundred sixteen".