51415066021679 has 2 divisors, whose sum is σ = 51415066021680. Its totient is φ = 51415066021678.

The previous prime is 51415066021667. The next prime is 51415066021717. The reversal of 51415066021679 is 97612066051415.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51415066021679 is a prime.

It is a super-2 number, since 2×51415066021679² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51415066021679.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51415066021609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25707533010839 + 25707533010840.

It is an arithmetic number, because the mean of its divisors is an integer number (25707533010840).

Almost surely, 2^{51415066021679} is an apocalyptic number.

51415066021679 is a deficient number, since it is larger than the sum of its proper divisors (1).

51415066021679 is an equidigital number, since it uses as much as digits as its factorization.

51415066021679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2721600, while the sum is 53.

The spelling of 51415066021679 in words is "fifty-one trillion, four hundred fifteen billion, sixty-six million, twenty-one thousand, six hundred seventy-nine".