78785204419 has 2 divisors, whose sum is σ = 78785204420. Its totient is φ = 78785204418.

The previous prime is 78785204411. The next prime is 78785204437. The reversal of 78785204419 is 91440258787.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78785204419 - 2³ = 78785204411 is a prime.

It is a super-2 number, since 2×78785204419² (a number of 23 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 78785204419.

It is not a weakly prime, because it can be changed into another prime (78785204411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39392602209 + 39392602210.

It is an arithmetic number, because the mean of its divisors is an integer number (39392602210).

Almost surely, 2^78785204419 is an apocalyptic number.

78785204419 is a deficient number, since it is larger than the sum of its proper divisors (1).

78785204419 is an equidigital number, since it uses as much as digits as its factorization.

78785204419 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4515840, while the sum is 55.

The spelling of 78785204419 in words is "seventy-eight billion, seven hundred eighty-five million, two hundred four thousand, four hundred nineteen".