51966246551 has 2 divisors, whose sum is σ = 51966246552. Its totient is φ = 51966246550.

The previous prime is 51966246547. The next prime is 51966246617. The reversal of 51966246551 is 15564266915.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51966246551 - 2² = 51966246547 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51966246551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51966246511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25983123275 + 25983123276.

It is an arithmetic number, because the mean of its divisors is an integer number (25983123276).

Almost surely, 2^51966246551 is an apocalyptic number.

51966246551 is a deficient number, since it is larger than the sum of its proper divisors (1).

51966246551 is an equidigital number, since it uses as much as digits as its factorization.

51966246551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944000, while the sum is 50.

The spelling of 51966246551 in words is "fifty-one billion, nine hundred sixty-six million, two hundred forty-six thousand, five hundred fifty-one".