78183251317439 has 2 divisors, whose sum is σ = 78183251317440. Its totient is φ = 78183251317438.

The previous prime is 78183251317403. The next prime is 78183251317441. The reversal of 78183251317439 is 93471315238187.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78183251317439 - 2³⁶ = 78114531840703 is a prime.

It is a super-2 number, since 2×78183251317439² (a number of 29 digits) contains 22 as substring.

Together with 78183251317441, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78183251337439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39091625658719 + 39091625658720.

It is an arithmetic number, because the mean of its divisors is an integer number (39091625658720).

Almost surely, 2^{78183251317439} is an apocalyptic number.

78183251317439 is a deficient number, since it is larger than the sum of its proper divisors (1).

78183251317439 is an equidigital number, since it uses as much as digits as its factorization.

78183251317439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30481920, while the sum is 62.

The spelling of 78183251317439 in words is "seventy-eight trillion, one hundred eighty-three billion, two hundred fifty-one million, three hundred seventeen thousand, four hundred thirty-nine".