191439682972 has 24 divisors (see below), whose sum is σ = 352922048640. Its totient is φ = 90612526320.

The previous prime is 191439682961. The next prime is 191439682979. The reversal of 191439682972 is 279286934191.

191439682972 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 191439682972.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191439682979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 864304 + ... + 1062967.

It is an arithmetic number, because the mean of its divisors is an integer number (14705085360).

Almost surely, 2^191439682972 is an apocalyptic number.

It is an amenable number.

191439682972 is a deficient number, since it is larger than the sum of its proper divisors (161482365668).

191439682972 is a wasteful number, since it uses less digits than its factorization.

191439682972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1928601 (or 1928599 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 61.

The spelling of 191439682972 in words is "one hundred ninety-one billion, four hundred thirty-nine million, six hundred eighty-two thousand, nine hundred seventy-two".