161399894058 has 32 divisors (see below), whose sum is σ = 386256158400. Its totient is φ = 49661505648.

The previous prime is 161399894003. The next prime is 161399894059. The reversal of 161399894058 is 850498993161.

161399894058 is a `hidden beast` number, since 1 + 6 + 139 + 98 + 9 + 405 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 161399893986 and 161399894004.

It is not an unprimeable number, because it can be changed into a prime (161399894059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114956488 + ... + 114957891.

It is an arithmetic number, because the mean of its divisors is an integer number (12070504950).

Almost surely, 2^161399894058 is an apocalyptic number.

161399894058 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

161399894058 is an abundant number, since it is smaller than the sum of its proper divisors (224856264342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161399894058 is a wasteful number, since it uses less digits than its factorization.

161399894058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229914403 (or 229914397 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 63.

The spelling of 161399894058 in words is "one hundred sixty-one billion, three hundred ninety-nine million, eight hundred ninety-four thousand, fifty-eight".