78085755256079 has 16 divisors (see below), whose sum is σ = 80010091988640. Its totient is φ = 76166353858560.

The previous prime is 78085755256057. The next prime is 78085755256081. The reversal of 78085755256079 is 97065255758087.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 78085755256079 - 2¹⁶ = 78085755190543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78085755255997 and 78085755256015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78085755258079) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1223710127 + ... + 1223773935.

It is an arithmetic number, because the mean of its divisors is an integer number (5000630749290).

Almost surely, 2^{78085755256079} is an apocalyptic number.

78085755256079 is a deficient number, since it is larger than the sum of its proper divisors (1924336732561).

78085755256079 is a wasteful number, since it uses less digits than its factorization.

78085755256079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102010.

The product of its (nonzero) digits is 1481760000, while the sum is 74.

The spelling of 78085755256079 in words is "seventy-eight trillion, eighty-five billion, seven hundred fifty-five million, two hundred fifty-six thousand, seventy-nine".