51777077699 has 2 divisors, whose sum is σ = 51777077700. Its totient is φ = 51777077698.

The previous prime is 51777077683. The next prime is 51777077719. The reversal of 51777077699 is 99677077715.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51777077699 - 2⁴ = 51777077683 is a prime.

It is not a weakly prime, because it can be changed into another prime (51777077299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25888538849 + 25888538850.

It is an arithmetic number, because the mean of its divisors is an integer number (25888538850).

Almost surely, 2^51777077699 is an apocalyptic number.

51777077699 is a deficient number, since it is larger than the sum of its proper divisors (1).

51777077699 is an equidigital number, since it uses as much as digits as its factorization.

51777077699 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40841010, while the sum is 65.

The spelling of 51777077699 in words is "fifty-one billion, seven hundred seventy-seven million, seventy-seven thousand, six hundred ninety-nine".