42648715870493 has 2 divisors, whose sum is σ = 42648715870494. Its totient is φ = 42648715870492.

The previous prime is 42648715870399. The next prime is 42648715870547. The reversal of 42648715870493 is 39407851784624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41498101377604 + 1150614492889 = 6441902^2 + 1072667^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42648715870493 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42648715878493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21324357935246 + 21324357935247.

It is an arithmetic number, because the mean of its divisors is an integer number (21324357935247).

It is a 2-persistent number, because it is pandigital, and so is 2⋅42648715870493 = 85297431740986, but 3⋅42648715870493 = 127946147611479 is not.

Almost surely, 2^{42648715870493} is an apocalyptic number.

It is an amenable number.

42648715870493 is a deficient number, since it is larger than the sum of its proper divisors (1).

42648715870493 is an equidigital number, since it uses as much as digits as its factorization.

42648715870493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 325140480, while the sum is 68.

The spelling of 42648715870493 in words is "forty-two trillion, six hundred forty-eight billion, seven hundred fifteen million, eight hundred seventy thousand, four hundred ninety-three".