78448316951 has 2 divisors, whose sum is σ = 78448316952. Its totient is φ = 78448316950.

The previous prime is 78448316927. The next prime is 78448316981. The reversal of 78448316951 is 15961384487.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (15961384487) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78448316951 - 2⁶ = 78448316887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78448316911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39224158475 + 39224158476.

It is an arithmetic number, because the mean of its divisors is an integer number (39224158476).

Almost surely, 2^78448316951 is an apocalyptic number.

78448316951 is a deficient number, since it is larger than the sum of its proper divisors (1).

78448316951 is an equidigital number, since it uses as much as digits as its factorization.

78448316951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5806080, while the sum is 56.

The spelling of 78448316951 in words is "seventy-eight billion, four hundred forty-eight million, three hundred sixteen thousand, nine hundred fifty-one".