78422107251 has 32 divisors (see below), whose sum is σ = 114906493440. Its totient is φ = 47353641984.

The previous prime is 78422107241. The next prime is 78422107303. The reversal of 78422107251 is 15270122487.

It is not a de Polignac number, because 78422107251 - 2⁵ = 78422107219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78422107201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2966745 + ... + 2993061.

It is an arithmetic number, because the mean of its divisors is an integer number (3590827920).

Almost surely, 2^78422107251 is an apocalyptic number.

78422107251 is a deficient number, since it is larger than the sum of its proper divisors (36484386189).

78422107251 is a wasteful number, since it uses less digits than its factorization.

78422107251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28635.

The product of its (nonzero) digits is 62720, while the sum is 39.

The spelling of 78422107251 in words is "seventy-eight billion, four hundred twenty-two million, one hundred seven thousand, two hundred fifty-one".