77366831551 has 2 divisors, whose sum is σ = 77366831552. Its totient is φ = 77366831550.

The previous prime is 77366831453. The next prime is 77366831579. The reversal of 77366831551 is 15513866377.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77366831551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77366831951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38683415775 + 38683415776.

It is an arithmetic number, because the mean of its divisors is an integer number (38683415776).

Almost surely, 2^77366831551 is an apocalyptic number.

77366831551 is a deficient number, since it is larger than the sum of its proper divisors (1).

77366831551 is an equidigital number, since it uses as much as digits as its factorization.

77366831551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3175200, while the sum is 52.

The spelling of 77366831551 in words is "seventy-seven billion, three hundred sixty-six million, eight hundred thirty-one thousand, five hundred fifty-one".