78826383439 has 2 divisors, whose sum is σ = 78826383440. Its totient is φ = 78826383438.

The previous prime is 78826383313. The next prime is 78826383451. The reversal of 78826383439 is 93438362887.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78826383439 - 2¹⁵ = 78826350671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78826383469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39413191719 + 39413191720.

It is an arithmetic number, because the mean of its divisors is an integer number (39413191720).

Almost surely, 2^78826383439 is an apocalyptic number.

78826383439 is a deficient number, since it is larger than the sum of its proper divisors (1).

78826383439 is an equidigital number, since it uses as much as digits as its factorization.

78826383439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41803776, while the sum is 61.

The spelling of 78826383439 in words is "seventy-eight billion, eight hundred twenty-six million, three hundred eighty-three thousand, four hundred thirty-nine".