78879497887 has 2 divisors, whose sum is σ = 78879497888. Its totient is φ = 78879497886.

The previous prime is 78879497869. The next prime is 78879497909.

78879497887 is nontrivially palindromic in base 10.

It is a weak prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 78879497887 - 2⁷ = 78879497759 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78879497887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78879497857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39439748943 + 39439748944.

It is an arithmetic number, because the mean of its divisors is an integer number (39439748944).

Almost surely, 2^78879497887 is an apocalyptic number.

78879497887 is a deficient number, since it is larger than the sum of its proper divisors (1).

78879497887 is an equidigital number, since it uses as much as digits as its factorization.

78879497887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3186376704, while the sum is 82.

The spelling of 78879497887 in words is "seventy-eight billion, eight hundred seventy-nine million, four hundred ninety-seven thousand, eight hundred eighty-seven".