191316989340 has 60 divisors (see below), whose sum is σ = 600168486456. Its totient is φ = 51017863392.

The previous prime is 191316989309. The next prime is 191316989341. The reversal of 191316989340 is 43989613191.

191316989340 is a `hidden beast` number, since 191 + 31 + 6 + 9 + 89 + 340 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191316989341) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 59046834 + ... + 59050073.

Almost surely, 2^191316989340 is an apocalyptic number.

191316989340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191316989340 is an abundant number, since it is smaller than the sum of its proper divisors (408851497116).

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

191316989340 is a wasteful number, since it uses less digits than its factorization.

191316989340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118096928 (or 118096917 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 54.

The spelling of 191316989340 in words is "one hundred ninety-one billion, three hundred sixteen million, nine hundred eighty-nine thousand, three hundred forty".