78382639757831 has 2 divisors, whose sum is σ = 78382639757832. Its totient is φ = 78382639757830.

The previous prime is 78382639757801. The next prime is 78382639757833. The reversal of 78382639757831 is 13875793628387.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78382639757831 - 2⁴⁶ = 8013895580167 is a prime.

It is a super-2 number, since 2×78382639757831² (a number of 29 digits) contains 22 as substring.

Together with 78382639757833, 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 (78382639757833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39191319878915 + 39191319878916.

It is an arithmetic number, because the mean of its divisors is an integer number (39191319878916).

Almost surely, 2^{78382639757831} is an apocalyptic number.

78382639757831 is a deficient number, since it is larger than the sum of its proper divisors (1).

78382639757831 is an equidigital number, since it uses as much as digits as its factorization.

78382639757831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2560481280, while the sum is 77.

The spelling of 78382639757831 in words is "seventy-eight trillion, three hundred eighty-two billion, six hundred thirty-nine million, seven hundred fifty-seven thousand, eight hundred thirty-one".