161143564073155 has 8 divisors (see below), whose sum is σ = 193372936329312. Its totient is φ = 128914411630848.

The previous prime is 161143564073153. The next prime is 161143564073197. The reversal of 161143564073155 is 551370465341161.

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 161143564073155 - 2¹ = 161143564073153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161143564073153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53336334 + ... + 56276563.

It is an arithmetic number, because the mean of its divisors is an integer number (24171617041164).

Almost surely, 2^{161143564073155} is an apocalyptic number.

161143564073155 is a deficient number, since it is larger than the sum of its proper divisors (32229372256157).

161143564073155 is a wasteful number, since it uses less digits than its factorization.

161143564073155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109906925.

The product of its (nonzero) digits is 4536000, while the sum is 52.

The spelling of 161143564073155 in words is "one hundred sixty-one trillion, one hundred forty-three billion, five hundred sixty-four million, seventy-three thousand, one hundred fifty-five".