161811676272 has 20 divisors (see below), whose sum is σ = 418013497160. Its totient is φ = 53937225408.

The previous prime is 161811676237. The next prime is 161811676307. The reversal of 161811676272 is 272676118161.

161811676272 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (161811676237) and next prime (161811676307).

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 3371076589 = 161811676272 / (1 + 6 + 1 + 8 + 1 + 1 + 6 + 7 + 6 + 2 + 7 + 2).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1685538247 + ... + 1685538342.

It is an arithmetic number, because the mean of its divisors is an integer number (20900674858).

Almost surely, 2^161811676272 is an apocalyptic number.

161811676272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161811676272 is an abundant number, since it is smaller than the sum of its proper divisors (256201820888).

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

161811676272 is a wasteful number, since it uses less digits than its factorization.

161811676272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3371076600 (or 3371076594 counting only the distinct ones).

The product of its digits is 338688, while the sum is 48.

The spelling of 161811676272 in words is "one hundred sixty-one billion, eight hundred eleven million, six hundred seventy-six thousand, two hundred seventy-two".