161137322059 has 4 divisors (see below), whose sum is σ = 184156939504. Its totient is φ = 138117704616.

The previous prime is 161137321979. The next prime is 161137322081. The reversal of 161137322059 is 950223731161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161137322059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161137322089) 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, 11509808712 + ... + 11509808725.

It is an arithmetic number, because the mean of its divisors is an integer number (46039234876).

Almost surely, 2^161137322059 is an apocalyptic number.

161137322059 is a deficient number, since it is larger than the sum of its proper divisors (23019617445).

161137322059 is an equidigital number, since it uses as much as digits as its factorization.

161137322059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23019617444.

The product of its (nonzero) digits is 68040, while the sum is 40.

The spelling of 161137322059 in words is "one hundred sixty-one billion, one hundred thirty-seven million, three hundred twenty-two thousand, fifty-nine".