78340605419 has 4 divisors (see below), whose sum is σ = 82948876344. Its totient is φ = 73732334496.

The previous prime is 78340605397. The next prime is 78340605493. The reversal of 78340605419 is 91450604387.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91450604387 = 317 ⋅288487711.

It is a cyclic number.

It is not a de Polignac number, because 78340605419 - 2²⁰ = 78339556843 is a prime.

It is a super-2 number, since 2×78340605419² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78340605319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2304135437 + ... + 2304135470.

It is an arithmetic number, because the mean of its divisors is an integer number (20737219086).

Almost surely, 2^78340605419 is an apocalyptic number.

78340605419 is a deficient number, since it is larger than the sum of its proper divisors (4608270925).

78340605419 is a wasteful number, since it uses less digits than its factorization.

78340605419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4608270924.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 78340605419 in words is "seventy-eight billion, three hundred forty million, six hundred five thousand, four hundred nineteen".