51516356125459 has 2 divisors, whose sum is σ = 51516356125460. Its totient is φ = 51516356125458.

The previous prime is 51516356125441. The next prime is 51516356125471. The reversal of 51516356125459 is 95452165361515.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51516356125459 - 2¹¹ = 51516356123411 is a prime.

It is not a weakly prime, because it can be changed into another prime (51516356125499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25758178062729 + 25758178062730.

It is an arithmetic number, because the mean of its divisors is an integer number (25758178062730).

Almost surely, 2^{51516356125459} is an apocalyptic number.

51516356125459 is a deficient number, since it is larger than the sum of its proper divisors (1).

51516356125459 is an equidigital number, since it uses as much as digits as its factorization.

51516356125459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24300000, while the sum is 58.

The spelling of 51516356125459 in words is "fifty-one trillion, five hundred sixteen billion, three hundred fifty-six million, one hundred twenty-five thousand, four hundred fifty-nine".