78323249075 has 6 divisors (see below), whose sum is σ = 97120828884. Its totient is φ = 62658599240.

The previous prime is 78323249071. The next prime is 78323249083. The reversal of 78323249075 is 57094232387.

It is a happy number.

It is not a de Polignac number, because 78323249075 - 2² = 78323249071 is a prime.

It is a super-2 number, since 2×78323249075² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78323249071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1566464957 + ... + 1566465006.

It is an arithmetic number, because the mean of its divisors is an integer number (16186804814).

Almost surely, 2^78323249075 is an apocalyptic number.

78323249075 is a deficient number, since it is larger than the sum of its proper divisors (18797579809).

78323249075 is a wasteful number, since it uses less digits than its factorization.

78323249075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3132929973 (or 3132929968 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 50.

The spelling of 78323249075 in words is "seventy-eight billion, three hundred twenty-three million, two hundred forty-nine thousand, seventy-five".