78513231273 has 16 divisors (see below), whose sum is σ = 115661437056. Its totient is φ = 47121324800.

The previous prime is 78513231263. The next prime is 78513231347. The reversal of 78513231273 is 37213231587.

It is a cyclic number.

It is not a de Polignac number, because 78513231273 - 2⁵ = 78513231241 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78513231253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33465678 + ... + 33468023.

It is an arithmetic number, because the mean of its divisors is an integer number (7228839816).

Almost surely, 2^78513231273 is an apocalyptic number.

It is an amenable number.

78513231273 is a deficient number, since it is larger than the sum of its proper divisors (37148205783).

78513231273 is a wasteful number, since it uses less digits than its factorization.

78513231273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66933744.

The product of its digits is 211680, while the sum is 42.

The spelling of 78513231273 in words is "seventy-eight billion, five hundred thirteen million, two hundred thirty-one thousand, two hundred seventy-three".