78376815410039 has 2 divisors, whose sum is σ = 78376815410040. Its totient is φ = 78376815410038.

The previous prime is 78376815410017. The next prime is 78376815410053. The reversal of 78376815410039 is 93001451867387.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78376815410039 - 2⁴⁴ = 60784629365623 is a prime.

It is a super-2 number, since 2×78376815410039² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78376815410059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39188407705019 + 39188407705020.

It is an arithmetic number, because the mean of its divisors is an integer number (39188407705020).

Almost surely, 2^{78376815410039} is an apocalyptic number.

78376815410039 is a deficient number, since it is larger than the sum of its proper divisors (1).

78376815410039 is an equidigital number, since it uses as much as digits as its factorization.

78376815410039 is an evil number, because the sum of its binary digits is even.

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

The spelling of 78376815410039 in words is "seventy-eight trillion, three hundred seventy-six billion, eight hundred fifteen million, four hundred ten thousand, thirty-nine".