51126995761 has 2 divisors, whose sum is σ = 51126995762. Its totient is φ = 51126995760.

The previous prime is 51126995753. The next prime is 51126995819. The reversal of 51126995761 is 16759962115.

51126995761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49979073600 + 1147922161 = 223560^2 + 33881^2 .

It is a cyclic number.

It is not a de Polignac number, because 51126995761 - 2³ = 51126995753 is a prime.

It is a super-2 number, since 2×51126995761² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51126995699 and 51126995708.

It is not a weakly prime, because it can be changed into another prime (51126965761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25563497880 + 25563497881.

It is an arithmetic number, because the mean of its divisors is an integer number (25563497881).

Almost surely, 2^51126995761 is an apocalyptic number.

It is an amenable number.

51126995761 is a deficient number, since it is larger than the sum of its proper divisors (1).

51126995761 is an equidigital number, since it uses as much as digits as its factorization.

51126995761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1020600, while the sum is 52.

The spelling of 51126995761 in words is "fifty-one billion, one hundred twenty-six million, nine hundred ninety-five thousand, seven hundred sixty-one".