78513647423 has 2 divisors, whose sum is σ = 78513647424. Its totient is φ = 78513647422.

The previous prime is 78513647413. The next prime is 78513647453. The reversal of 78513647423 is 32474631587.

It is a weak prime.

It is an emirp because it is prime and its reverse (32474631587) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78513647423 - 2⁸ = 78513647167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78513647413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39256823711 + 39256823712.

It is an arithmetic number, because the mean of its divisors is an integer number (39256823712).

Almost surely, 2^78513647423 is an apocalyptic number.

78513647423 is a deficient number, since it is larger than the sum of its proper divisors (1).

78513647423 is an equidigital number, since it uses as much as digits as its factorization.

78513647423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3386880, while the sum is 50.

The spelling of 78513647423 in words is "seventy-eight billion, five hundred thirteen million, six hundred forty-seven thousand, four hundred twenty-three".