78765173852 has 6 divisors (see below), whose sum is σ = 137839054248. Its totient is φ = 39382586924.

The previous prime is 78765173849. The next prime is 78765173939. The reversal of 78765173852 is 25837156787.

It is a super-2 number, since 2×78765173852² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78765173791 and 78765173800.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 9845646728 + ... + 9845646735.

It is an arithmetic number, because the mean of its divisors is an integer number (22973175708).

Almost surely, 2^78765173852 is an apocalyptic number.

It is an amenable number.

78765173852 is a deficient number, since it is larger than the sum of its proper divisors (59073880396).

78765173852 is a wasteful number, since it uses less digits than its factorization.

78765173852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19691293467 (or 19691293465 counting only the distinct ones).

The product of its digits is 19756800, while the sum is 59.

The spelling of 78765173852 in words is "seventy-eight billion, seven hundred sixty-five million, one hundred seventy-three thousand, eight hundred fifty-two".