191306106280 has 16 divisors (see below), whose sum is σ = 430438739220. Its totient is φ = 76522442496.

The previous prime is 191306106259. The next prime is 191306106283. The reversal of 191306106280 is 82601603191.

It can be written as a sum of positive squares in 2 ways, for example, as 188441073604 + 2865032676 = 434098^2 + 53526^2 .

It is not an unprimeable number, because it can be changed into a prime (191306106283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2391326289 + ... + 2391326368.

Almost surely, 2^191306106280 is an apocalyptic number.

191306106280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191306106280 is an abundant number, since it is smaller than the sum of its proper divisors (239132632940).

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

191306106280 is a wasteful number, since it uses less digits than its factorization.

191306106280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4782652668 (or 4782652664 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The spelling of 191306106280 in words is "one hundred ninety-one billion, three hundred six million, one hundred six thousand, two hundred eighty".