78424748188 has 24 divisors (see below), whose sum is σ = 137972419200. Its totient is φ = 39004170480.

The previous prime is 78424748153. The next prime is 78424748191. The reversal of 78424748188 is 88184742487.

It is a super-2 number, since 2×78424748188² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3244395 + ... + 3268477.

It is an arithmetic number, because the mean of its divisors is an integer number (5748850800).

Almost surely, 2^78424748188 is an apocalyptic number.

It is an amenable number.

78424748188 is a deficient number, since it is larger than the sum of its proper divisors (59547671012).

78424748188 is a wasteful number, since it uses less digits than its factorization.

78424748188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28377 (or 28375 counting only the distinct ones).

The product of its digits is 25690112, while the sum is 61.

The spelling of 78424748188 in words is "seventy-eight billion, four hundred twenty-four million, seven hundred forty-eight thousand, one hundred eighty-eight".