78022120079 has 2 divisors, whose sum is σ = 78022120080. Its totient is φ = 78022120078.

The previous prime is 78022120021. The next prime is 78022120081. The reversal of 78022120079 is 97002122087.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78022120079 - 2⁸ = 78022119823 is a prime.

Together with 78022120081, 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 (78022120679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39011060039 + 39011060040.

It is an arithmetic number, because the mean of its divisors is an integer number (39011060040).

Almost surely, 2^78022120079 is an apocalyptic number.

78022120079 is a deficient number, since it is larger than the sum of its proper divisors (1).

78022120079 is an equidigital number, since it uses as much as digits as its factorization.

78022120079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 38.

The spelling of 78022120079 in words is "seventy-eight billion, twenty-two million, one hundred twenty thousand, seventy-nine".