161751267776 has 28 divisors (see below), whose sum is σ = 366828769008. Its totient is φ = 69321971712.

The previous prime is 161751267763. The next prime is 161751267779. The reversal of 161751267776 is 677762157161.

It is a tau number, because it is divible by the number of its divisors (28).

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161751267779) 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, 180525521 + ... + 180526416.

Almost surely, 2^161751267776 is an apocalyptic number.

161751267776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161751267776 is an abundant number, since it is smaller than the sum of its proper divisors (205077501232).

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

161751267776 is an equidigital number, since it uses as much as digits as its factorization.

161751267776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361051956 (or 361051946 counting only the distinct ones).

The product of its digits is 5186160, while the sum is 56.

The spelling of 161751267776 in words is "one hundred sixty-one billion, seven hundred fifty-one million, two hundred sixty-seven thousand, seven hundred seventy-six".