191422883880 has 480 divisors, whose sum is σ = 691446828600. Its totient is φ = 47482896384.

The previous prime is 191422883879. The next prime is 191422883887. The reversal of 191422883880 is 88388224191.

It can be written as a sum of positive squares in 12 ways, for example, as 34193187396 + 157229696484 = 184914^2 + 396522^2 .

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

It is not an unprimeable number, because it can be changed into a prime (191422883887) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 83334892 + ... + 83337188.

Almost surely, 2^191422883880 is an apocalyptic number.

191422883880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 191422883880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (345723414300).

191422883880 is an abundant number, since it is smaller than the sum of its proper divisors (500023944720).

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

191422883880 is a wasteful number, since it uses less digits than its factorization.

191422883880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2443 (or 2413 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 54.

The spelling of 191422883880 in words is "one hundred ninety-one billion, four hundred twenty-two million, eight hundred eighty-three thousand, eight hundred eighty".