78506653667711 has 2 divisors, whose sum is σ = 78506653667712. Its totient is φ = 78506653667710.

The previous prime is 78506653667671. The next prime is 78506653667789. The reversal of 78506653667711 is 11776635660587.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78506653667711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78506653667111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39253326833855 + 39253326833856.

It is an arithmetic number, because the mean of its divisors is an integer number (39253326833856).

Almost surely, 2^{78506653667711} is an apocalyptic number.

78506653667711 is a deficient number, since it is larger than the sum of its proper divisors (1).

78506653667711 is an equidigital number, since it uses as much as digits as its factorization.

78506653667711 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 266716800, while the sum is 68.

The spelling of 78506653667711 in words is "seventy-eight trillion, five hundred six billion, six hundred fifty-three million, six hundred sixty-seven thousand, seven hundred eleven".