51380772665279 has 2 divisors, whose sum is σ = 51380772665280. Its totient is φ = 51380772665278.

The previous prime is 51380772665239. The next prime is 51380772665359. The reversal of 51380772665279 is 97256627708315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51380772665279 - 2²⁸ = 51380504229823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51380772665239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25690386332639 + 25690386332640.

It is an arithmetic number, because the mean of its divisors is an integer number (25690386332640).

Almost surely, 2^{51380772665279} is an apocalyptic number.

51380772665279 is a deficient number, since it is larger than the sum of its proper divisors (1).

51380772665279 is an equidigital number, since it uses as much as digits as its factorization.

51380772665279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 266716800, while the sum is 68.

The spelling of 51380772665279 in words is "fifty-one trillion, three hundred eighty billion, seven hundred seventy-two million, six hundred sixty-five thousand, two hundred seventy-nine".