161389120858 has 16 divisors (see below), whose sum is σ = 276776869824. Its totient is φ = 69139314720.

The previous prime is 161389120853. The next prime is 161389120897. The reversal of 161389120858 is 858021983161.

It is not an unprimeable number, because it can be changed into a prime (161389120853) 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, 2251060 + ... + 2321647.

It is an arithmetic number, because the mean of its divisors is an integer number (17298554364).

Almost surely, 2^161389120858 is an apocalyptic number.

161389120858 is a deficient number, since it is larger than the sum of its proper divisors (115387748966).

161389120858 is a wasteful number, since it uses less digits than its factorization.

161389120858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4575237.

The product of its (nonzero) digits is 829440, while the sum is 52.

The spelling of 161389120858 in words is "one hundred sixty-one billion, three hundred eighty-nine million, one hundred twenty thousand, eight hundred fifty-eight".