78535481631571 has 2 divisors, whose sum is σ = 78535481631572. Its totient is φ = 78535481631570.

The previous prime is 78535481631547. The next prime is 78535481631589. The reversal of 78535481631571 is 17513618453587.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78535481631571 - 2¹¹ = 78535481629523 is a prime.

It is not a weakly prime, because it can be changed into another prime (78535481631371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39267740815785 + 39267740815786.

It is an arithmetic number, because the mean of its divisors is an integer number (39267740815786).

Almost surely, 2^{78535481631571} is an apocalyptic number.

78535481631571 is a deficient number, since it is larger than the sum of its proper divisors (1).

78535481631571 is an equidigital number, since it uses as much as digits as its factorization.

78535481631571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672000, while the sum is 64.

The spelling of 78535481631571 in words is "seventy-eight trillion, five hundred thirty-five billion, four hundred eighty-one million, six hundred thirty-one thousand, five hundred seventy-one".