161290889280 has 224 divisors, whose sum is σ = 593738208000. Its totient is φ = 41140813824.

The previous prime is 161290889233. The next prime is 161290889299. The reversal of 161290889280 is 82988092161.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 207105 + ... + 604544.

It is an arithmetic number, because the mean of its divisors is an integer number (2650617000).

Almost surely, 2^161290889280 is an apocalyptic number.

161290889280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161290889280 is an abundant number, since it is smaller than the sum of its proper divisors (432447318720).

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

161290889280 is a wasteful number, since it uses less digits than its factorization.

161290889280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811698 (or 811682 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 54.

The spelling of 161290889280 in words is "one hundred sixty-one billion, two hundred ninety million, eight hundred eighty-nine thousand, two hundred eighty".