77399552801 has 2 divisors, whose sum is σ = 77399552802. Its totient is φ = 77399552800.

The previous prime is 77399552771. The next prime is 77399552803. The reversal of 77399552801 is 10825599377.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71558925025 + 5840627776 = 267505^2 + 76424^2 .

It is a cyclic number.

It is not a de Polignac number, because 77399552801 - 2³⁴ = 60219683617 is a prime.

Together with 77399552803, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (77399552803) 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, 38699776400 + 38699776401.

It is an arithmetic number, because the mean of its divisors is an integer number (38699776401).

Almost surely, 2^77399552801 is an apocalyptic number.

It is an amenable number.

77399552801 is a deficient number, since it is larger than the sum of its proper divisors (1).

77399552801 is an equidigital number, since it uses as much as digits as its factorization.

77399552801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4762800, while the sum is 56.

The spelling of 77399552801 in words is "seventy-seven billion, three hundred ninety-nine million, five hundred fifty-two thousand, eight hundred one".