78785748853579 has 2 divisors, whose sum is σ = 78785748853580. Its totient is φ = 78785748853578.

The previous prime is 78785748853463. The next prime is 78785748853597. The reversal of 78785748853579 is 97535884758787.

Together with next prime (78785748853597) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78785748853579 - 2⁷ = 78785748853451 is a prime.

It is a super-2 number, since 2×78785748853579² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78785748853493 and 78785748853502.

It is not a weakly prime, because it can be changed into another prime (78785748833579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39392874426789 + 39392874426790.

It is an arithmetic number, because the mean of its divisors is an integer number (39392874426790).

Almost surely, 2^{78785748853579} is an apocalyptic number.

78785748853579 is a deficient number, since it is larger than the sum of its proper divisors (1).

78785748853579 is an equidigital number, since it uses as much as digits as its factorization.

78785748853579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 132765696000, while the sum is 91.

The spelling of 78785748853579 in words is "seventy-eight trillion, seven hundred eighty-five billion, seven hundred forty-eight million, eight hundred fifty-three thousand, five hundred seventy-nine".