191910707140 has 12 divisors (see below), whose sum is σ = 403012485036. Its totient is φ = 76764282848.

The previous prime is 191910707129. The next prime is 191910707141. The reversal of 191910707140 is 41707019191.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 46046293056 + 145864414084 = 214584^2 + 381922^2 .

It is a junction number, because it is equal to n+sod(n) for n = 191910707093 and 191910707102.

It is not an unprimeable number, because it can be changed into a prime (191910707141) 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, 4797767659 + ... + 4797767698.

It is an arithmetic number, because the mean of its divisors is an integer number (33584373753).

Almost surely, 2^191910707140 is an apocalyptic number.

191910707140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191910707140 is an abundant number, since it is smaller than the sum of its proper divisors (211101777896).

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

191910707140 is a wasteful number, since it uses less digits than its factorization.

191910707140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9595535366 (or 9595535364 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 40.

The spelling of 191910707140 in words is "one hundred ninety-one billion, nine hundred ten million, seven hundred seven thousand, one hundred forty".