78585870967 has 2 divisors, whose sum is σ = 78585870968. Its totient is φ = 78585870966.

The previous prime is 78585870917. The next prime is 78585870971. The reversal of 78585870967 is 76907858587.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78585870967 - 2²³ = 78577482359 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 78585870896 and 78585870905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78585870917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39292935483 + 39292935484.

It is an arithmetic number, because the mean of its divisors is an integer number (39292935484).

Almost surely, 2^78585870967 is an apocalyptic number.

78585870967 is a deficient number, since it is larger than the sum of its proper divisors (1).

78585870967 is an equidigital number, since it uses as much as digits as its factorization.

78585870967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 237081600, while the sum is 70.

The spelling of 78585870967 in words is "seventy-eight billion, five hundred eighty-five million, eight hundred seventy thousand, nine hundred sixty-seven".