78751774752473 has 2 divisors, whose sum is σ = 78751774752474. Its totient is φ = 78751774752472.

The previous prime is 78751774752389. The next prime is 78751774752479. The reversal of 78751774752473 is 37425747715787.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78701684731609 + 50090020864 = 8871397^2 + 223808^2 .

It is a cyclic number.

It is not a de Polignac number, because 78751774752473 - 2¹⁰ = 78751774751449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78751774752473.

It is not a weakly prime, because it can be changed into another prime (78751774752479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39375887376236 + 39375887376237.

It is an arithmetic number, because the mean of its divisors is an integer number (39375887376237).

Almost surely, 2^{78751774752473} is an apocalyptic number.

It is an amenable number.

78751774752473 is a deficient number, since it is larger than the sum of its proper divisors (1).

78751774752473 is an equidigital number, since it uses as much as digits as its factorization.

78751774752473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2258860800, while the sum is 74.

The spelling of 78751774752473 in words is "seventy-eight trillion, seven hundred fifty-one billion, seven hundred seventy-four million, seven hundred fifty-two thousand, four hundred seventy-three".