51026315761 has 2 divisors, whose sum is σ = 51026315762. Its totient is φ = 51026315760.

The previous prime is 51026315729. The next prime is 51026315789. The reversal of 51026315761 is 16751362015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42607152225 + 8419163536 = 206415^2 + 91756^2 .

It is a cyclic number.

It is not a de Polignac number, because 51026315761 - 2⁵ = 51026315729 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51026315761.

It is not a weakly prime, because it can be changed into another prime (51024315761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25513157880 + 25513157881.

It is an arithmetic number, because the mean of its divisors is an integer number (25513157881).

Almost surely, 2^51026315761 is an apocalyptic number.

It is an amenable number.

51026315761 is a deficient number, since it is larger than the sum of its proper divisors (1).

51026315761 is an equidigital number, since it uses as much as digits as its factorization.

51026315761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 37.

Adding to 51026315761 its reverse (16751362015), we get a palindrome (67777677776).

The spelling of 51026315761 in words is "fifty-one billion, twenty-six million, three hundred fifteen thousand, seven hundred sixty-one".