77136928991 has 2 divisors, whose sum is σ = 77136928992. Its totient is φ = 77136928990.

The previous prime is 77136928877. The next prime is 77136929047. The reversal of 77136928991 is 19982963177.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77136928991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77136928391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38568464495 + 38568464496.

It is an arithmetic number, because the mean of its divisors is an integer number (38568464496).

Almost surely, 2^77136928991 is an apocalyptic number.

77136928991 is a deficient number, since it is larger than the sum of its proper divisors (1).

77136928991 is an equidigital number, since it uses as much as digits as its factorization.

77136928991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10287648, while the sum is 62.

The spelling of 77136928991 in words is "seventy-seven billion, one hundred thirty-six million, nine hundred twenty-eight thousand, nine hundred ninety-one".