78812647259 has 2 divisors, whose sum is σ = 78812647260. Its totient is φ = 78812647258.

The previous prime is 78812647237. The next prime is 78812647267. The reversal of 78812647259 is 95274621887.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78812647259 is a prime.

It is a super-2 number, since 2×78812647259² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78812647198 and 78812647207.

It is not a weakly prime, because it can be changed into another prime (78812647559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39406323629 + 39406323630.

It is an arithmetic number, because the mean of its divisors is an integer number (39406323630).

Almost surely, 2^78812647259 is an apocalyptic number.

78812647259 is a deficient number, since it is larger than the sum of its proper divisors (1).

78812647259 is an equidigital number, since it uses as much as digits as its factorization.

78812647259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13547520, while the sum is 59.

The spelling of 78812647259 in words is "seventy-eight billion, eight hundred twelve million, six hundred forty-seven thousand, two hundred fifty-nine".