77840373911 has 2 divisors, whose sum is σ = 77840373912. Its totient is φ = 77840373910.

The previous prime is 77840373907. The next prime is 77840373913. The reversal of 77840373911 is 11937304877.

It is a strong prime.

It is an emirp because it is prime and its reverse (11937304877) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77840373911 - 2² = 77840373907 is a prime.

It is a super-3 number, since 3×77840373911³ (a number of 34 digits) contains 333 as substring.

Together with 77840373913, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77840373911.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77840373913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38920186955 + 38920186956.

It is an arithmetic number, because the mean of its divisors is an integer number (38920186956).

Almost surely, 2^77840373911 is an apocalyptic number.

77840373911 is a deficient number, since it is larger than the sum of its proper divisors (1).

77840373911 is an equidigital number, since it uses as much as digits as its factorization.

77840373911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 889056, while the sum is 50.

The spelling of 77840373911 in words is "seventy-seven billion, eight hundred forty million, three hundred seventy-three thousand, nine hundred eleven".