161822645759 has 8 divisors (see below), whose sum is σ = 167867891520. Its totient is φ = 155877321600.

The previous prime is 161822645693. The next prime is 161822645791. The reversal of 161822645759 is 957546228161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161822645759 - 2²⁰ = 161821597183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161822645059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24977102 + ... + 24983579.

It is an arithmetic number, because the mean of its divisors is an integer number (20983486440).

Almost surely, 2^161822645759 is an apocalyptic number.

161822645759 is a deficient number, since it is larger than the sum of its proper divisors (6045245761).

161822645759 is an equidigital number, since it uses as much as digits as its factorization.

161822645759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49960801.

The product of its digits is 7257600, while the sum is 56.

The spelling of 161822645759 in words is "one hundred sixty-one billion, eight hundred twenty-two million, six hundred forty-five thousand, seven hundred fifty-nine".