51426145261 has 2 divisors, whose sum is σ = 51426145262. Its totient is φ = 51426145260.

The previous prime is 51426145217. The next prime is 51426145289. The reversal of 51426145261 is 16254162415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46653408036 + 4772737225 = 215994^2 + 69085^2 .

It is a cyclic number.

It is not a de Polignac number, because 51426145261 - 2²⁹ = 50889274349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51426145261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51426145201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25713072630 + 25713072631.

It is an arithmetic number, because the mean of its divisors is an integer number (25713072631).

Almost surely, 2^51426145261 is an apocalyptic number.

It is an amenable number.

51426145261 is a deficient number, since it is larger than the sum of its proper divisors (1).

51426145261 is an equidigital number, since it uses as much as digits as its factorization.

51426145261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57600, while the sum is 37.

The spelling of 51426145261 in words is "fifty-one billion, four hundred twenty-six million, one hundred forty-five thousand, two hundred sixty-one".