161017773001 has 4 divisors (see below), whose sum is σ = 161117972352. Its totient is φ = 160917573652.

The previous prime is 161017772983. The next prime is 161017773031. The reversal of 161017773001 is 100377710161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 161017773001 - 2⁵ = 161017772969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161017773031) 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, 50097265 + ... + 50100478.

It is an arithmetic number, because the mean of its divisors is an integer number (40279493088).

Almost surely, 2^161017773001 is an apocalyptic number.

It is an amenable number.

161017773001 is a deficient number, since it is larger than the sum of its proper divisors (100199351).

161017773001 is a wasteful number, since it uses less digits than its factorization.

161017773001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100199350.

The product of its (nonzero) digits is 6174, while the sum is 34.

The spelling of 161017773001 in words is "one hundred sixty-one billion, seventeen million, seven hundred seventy-three thousand, one".