191447276043 has 4 divisors (see below), whose sum is σ = 255263034728. Its totient is φ = 127631517360.

The previous prime is 191447276029. The next prime is 191447276047. The reversal of 191447276043 is 340672744191.

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

It is not a de Polignac number, because 191447276043 - 2¹² = 191447271947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 191447275983 and 191447276001.

It is not an unprimeable number, because it can be changed into a prime (191447276047) 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 3 ways as a sum of consecutive naturals, for example, 31907879338 + ... + 31907879343.

It is an arithmetic number, because the mean of its divisors is an integer number (63815758682).

Almost surely, 2^191447276043 is an apocalyptic number.

191447276043 is a deficient number, since it is larger than the sum of its proper divisors (63815758685).

191447276043 is an equidigital number, since it uses as much as digits as its factorization.

191447276043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63815758684.

The product of its (nonzero) digits is 1016064, while the sum is 48.

The spelling of 191447276043 in words is "one hundred ninety-one billion, four hundred forty-seven million, two hundred seventy-six thousand, forty-three".