78965593923 has 16 divisors (see below), whose sum is σ = 109562048640. Its totient is φ = 50547935424.

The previous prime is 78965593907. The next prime is 78965593933. The reversal of 78965593923 is 32939556987.

It is a happy number.

It is not a de Polignac number, because 78965593923 - 2⁴ = 78965593907 is a prime.

It is a super-2 number, since 2×78965593923² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78965593933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5179986 + ... + 5195207.

It is an arithmetic number, because the mean of its divisors is an integer number (6847628040).

Almost surely, 2^78965593923 is an apocalyptic number.

78965593923 is a deficient number, since it is larger than the sum of its proper divisors (30596454717).

78965593923 is a wasteful number, since it uses less digits than its factorization.

78965593923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10375298.

The product of its digits is 110224800, while the sum is 66.

The spelling of 78965593923 in words is "seventy-eight billion, nine hundred sixty-five million, five hundred ninety-three thousand, nine hundred twenty-three".