161911227459 has 8 divisors (see below), whose sum is σ = 216649899792. Its totient is φ = 107556686720.

The previous prime is 161911227427. The next prime is 161911227503. The reversal of 161911227459 is 954722119161.

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 161911227459 - 2⁵ = 161911227427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161911227259) 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, 96031914 + ... + 96033599.

It is an arithmetic number, because the mean of its divisors is an integer number (27081237474).

Almost surely, 2^161911227459 is an apocalyptic number.

161911227459 is a deficient number, since it is larger than the sum of its proper divisors (54738672333).

161911227459 is a wasteful number, since it uses less digits than its factorization.

161911227459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192065797.

The product of its digits is 272160, while the sum is 48.

The spelling of 161911227459 in words is "one hundred sixty-one billion, nine hundred eleven million, two hundred twenty-seven thousand, four hundred fifty-nine".