76890136891 has 2 divisors, whose sum is σ = 76890136892. Its totient is φ = 76890136890.

The previous prime is 76890136889. The next prime is 76890136901. The reversal of 76890136891 is 19863109867.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 76890136891 - 2¹ = 76890136889 is a prime.

It is a super-2 number, since 2×76890136891² (a number of 23 digits) contains 22 as substring.

Together with 76890136889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (76890136991) 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, 38445068445 + 38445068446.

It is an arithmetic number, because the mean of its divisors is an integer number (38445068446).

Almost surely, 2^76890136891 is an apocalyptic number.

76890136891 is a deficient number, since it is larger than the sum of its proper divisors (1).

76890136891 is an equidigital number, since it uses as much as digits as its factorization.

76890136891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3919104, while the sum is 58.

The spelling of 76890136891 in words is "seventy-six billion, eight hundred ninety million, one hundred thirty-six thousand, eight hundred ninety-one".