76445839891 has 2 divisors, whose sum is σ = 76445839892. Its totient is φ = 76445839890.

The previous prime is 76445839889. The next prime is 76445839901. The reversal of 76445839891 is 19893854467.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 76445839891 - 2¹ = 76445839889 is a prime.

Together with 76445839889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (76445839871) 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 as a sum of consecutive naturals, namely, 38222919945 + 38222919946.

It is an arithmetic number, because the mean of its divisors is an integer number (38222919946).

Almost surely, 2^76445839891 is an apocalyptic number.

76445839891 is a deficient number, since it is larger than the sum of its proper divisors (1).

76445839891 is an equidigital number, since it uses as much as digits as its factorization.

76445839891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52254720, while the sum is 64.

The spelling of 76445839891 in words is "seventy-six billion, four hundred forty-five million, eight hundred thirty-nine thousand, eight hundred ninety-one".