515023421293673 has 2 divisors, whose sum is σ = 515023421293674. Its totient is φ = 515023421293672.

The previous prime is 515023421293649. The next prime is 515023421293751. The reversal of 515023421293673 is 376392124320515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 358525022649049 + 156498398644624 = 18934757^2 + 12509932^2 .

It is a cyclic number.

It is not a de Polignac number, because 515023421293673 - 2⁶ = 515023421293609 is a prime.

It is not a weakly prime, because it can be changed into another prime (515023421293603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257511710646836 + 257511710646837.

It is an arithmetic number, because the mean of its divisors is an integer number (257511710646837).

Almost surely, 2^{515023421293673} is an apocalyptic number.

It is an amenable number.

515023421293673 is a deficient number, since it is larger than the sum of its proper divisors (1).

515023421293673 is an equidigital number, since it uses as much as digits as its factorization.

515023421293673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8164800, while the sum is 53.

The spelling of 515023421293673 in words is "five hundred fifteen trillion, twenty-three billion, four hundred twenty-one million, two hundred ninety-three thousand, six hundred seventy-three".