161349090860 has 48 divisors (see below), whose sum is σ = 346608049536. Its totient is φ = 63063182592.

The previous prime is 161349090853. The next prime is 161349090869. The reversal of 161349090860 is 68090943161.

161349090860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is not an unprimeable number, because it can be changed into a prime (161349090869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 436214 + ... + 716226.

It is an arithmetic number, because the mean of its divisors is an integer number (7221001032).

Almost surely, 2^161349090860 is an apocalyptic number.

161349090860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161349090860 is an abundant number, since it is smaller than the sum of its proper divisors (185258958676).

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

161349090860 is a wasteful number, since it uses less digits than its factorization.

161349090860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280682 (or 280680 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 47.

The spelling of 161349090860 in words is "one hundred sixty-one billion, three hundred forty-nine million, ninety thousand, eight hundred sixty".