191748010487 has 4 divisors (see below), whose sum is σ = 209179647816. Its totient is φ = 174316373160.

The previous prime is 191748010471. The next prime is 191748010543. The reversal of 191748010487 is 784010847191.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 191748010487 - 2⁴ = 191748010471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191748010387) 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, 8715818648 + ... + 8715818669.

It is an arithmetic number, because the mean of its divisors is an integer number (52294911954).

Almost surely, 2^191748010487 is an apocalyptic number.

191748010487 is a deficient number, since it is larger than the sum of its proper divisors (17431637329).

191748010487 is a wasteful number, since it uses less digits than its factorization.

191748010487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17431637328.

The product of its (nonzero) digits is 451584, while the sum is 50.

The spelling of 191748010487 in words is "one hundred ninety-one billion, seven hundred forty-eight million, ten thousand, four hundred eighty-seven".