78513465271 has 2 divisors, whose sum is σ = 78513465272. Its totient is φ = 78513465270.

The previous prime is 78513465257. The next prime is 78513465287. The reversal of 78513465271 is 17256431587.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78513465271 - 2¹⁹ = 78512940983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78513465571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39256732635 + 39256732636.

It is an arithmetic number, because the mean of its divisors is an integer number (39256732636).

Almost surely, 2^78513465271 is an apocalyptic number.

78513465271 is a deficient number, since it is larger than the sum of its proper divisors (1).

78513465271 is an equidigital number, since it uses as much as digits as its factorization.

78513465271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1411200, while the sum is 49.

The spelling of 78513465271 in words is "seventy-eight billion, five hundred thirteen million, four hundred sixty-five thousand, two hundred seventy-one".