78425459029 has 2 divisors, whose sum is σ = 78425459030. Its totient is φ = 78425459028.

The previous prime is 78425459023. The next prime is 78425459081. The reversal of 78425459029 is 92095452487.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66783480625 + 11641978404 = 258425^2 + 107898^2 .

It is a cyclic number.

It is not a de Polignac number, because 78425459029 - 2⁵ = 78425458997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78425459023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39212729514 + 39212729515.

It is an arithmetic number, because the mean of its divisors is an integer number (39212729515).

Almost surely, 2^78425459029 is an apocalyptic number.

It is an amenable number.

78425459029 is a deficient number, since it is larger than the sum of its proper divisors (1).

78425459029 is an equidigital number, since it uses as much as digits as its factorization.

78425459029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7257600, while the sum is 55.

The spelling of 78425459029 in words is "seventy-eight billion, four hundred twenty-five million, four hundred fifty-nine thousand, twenty-nine".