811077977939 has 2 divisors, whose sum is σ = 811077977940. Its totient is φ = 811077977938.

The previous prime is 811077977921. The next prime is 811077977993. The reversal of 811077977939 is 939779770118.

811077977939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (811077977993) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 811077977939 - 2²⁰ = 811076929363 is a prime.

It is not a weakly prime, because it can be changed into another prime (811077917939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405538988969 + 405538988970.

It is an arithmetic number, because the mean of its divisors is an integer number (405538988970).

Almost surely, 2^811077977939 is an apocalyptic number.

811077977939 is a deficient number, since it is larger than the sum of its proper divisors (1).

811077977939 is an equidigital number, since it uses as much as digits as its factorization.

811077977939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42007896, while the sum is 68.

The spelling of 811077977939 in words is "eight hundred eleven billion, seventy-seven million, nine hundred seventy-seven thousand, nine hundred thirty-nine".