161780897075 has 12 divisors (see below), whose sum is σ = 229266642960. Its totient is φ = 110935472160.

The previous prime is 161780897051. The next prime is 161780897093. The reversal of 161780897075 is 570798087161.

161780897075 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161780897075 - 2⁶ = 161780897011 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 462230960 + ... + 462231309.

It is an arithmetic number, because the mean of its divisors is an integer number (19105553580).

Almost surely, 2^161780897075 is an apocalyptic number.

161780897075 is a deficient number, since it is larger than the sum of its proper divisors (67485745885).

161780897075 is an equidigital number, since it uses as much as digits as its factorization.

161780897075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924462286 (or 924462281 counting only the distinct ones).

The product of its (nonzero) digits is 5927040, while the sum is 59.

The spelling of 161780897075 in words is "one hundred sixty-one billion, seven hundred eighty million, eight hundred ninety-seven thousand, seventy-five".