191463731919 has 6 divisors (see below), whose sum is σ = 276558723896. Its totient is φ = 127642487940.

The previous prime is 191463731887. The next prime is 191463731923. The reversal of 191463731919 is 919137364191.

191463731919 is a `hidden beast` number, since 1 + 91 + 463 + 7 + 3 + 1 + 91 + 9 = 666.

It is not a de Polignac number, because 191463731919 - 2⁵ = 191463731887 is a prime.

It is a super-2 number, since 2×191463731919² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191463731999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10636873987 + ... + 10636874004.

Almost surely, 2^191463731919 is an apocalyptic number.

191463731919 is a deficient number, since it is larger than the sum of its proper divisors (85094991977).

191463731919 is a wasteful number, since it uses less digits than its factorization.

191463731919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21273747997 (or 21273747994 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 54.

The spelling of 191463731919 in words is "one hundred ninety-one billion, four hundred sixty-three million, seven hundred thirty-one thousand, nine hundred nineteen".