161722623045 has 8 divisors (see below), whose sum is σ = 258756196896. Its totient is φ = 86252065616.

The previous prime is 161722623037. The next prime is 161722623059. The reversal of 161722623045 is 540326227161.

161722623045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 161722623045 - 2³ = 161722623037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161722622994 and 161722623012.

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 7 ways as a sum of consecutive naturals, for example, 5390754087 + ... + 5390754116.

It is an arithmetic number, because the mean of its divisors is an integer number (32344524612).

Almost surely, 2^161722623045 is an apocalyptic number.

161722623045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161722623045 is a deficient number, since it is larger than the sum of its proper divisors (97033573851).

161722623045 is a wasteful number, since it uses less digits than its factorization.

161722623045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10781508211.

The product of its (nonzero) digits is 120960, while the sum is 39.

The spelling of 161722623045 in words is "one hundred sixty-one billion, seven hundred twenty-two million, six hundred twenty-three thousand, forty-five".