78332919938 has 48 divisors (see below), whose sum is σ = 145465886016. Its totient is φ = 30976770240.

The previous prime is 78332919919. The next prime is 78332919949. The reversal of 78332919938 is 83991923387.

It is a super-2 number, since 2×78332919938² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8354393 + ... + 8363763.

It is an arithmetic number, because the mean of its divisors is an integer number (3030539292).

Almost surely, 2^78332919938 is an apocalyptic number.

78332919938 is a deficient number, since it is larger than the sum of its proper divisors (67132966078).

78332919938 is a wasteful number, since it uses less digits than its factorization.

78332919938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12939 (or 12926 counting only the distinct ones).

The product of its digits is 17635968, while the sum is 62.

The spelling of 78332919938 in words is "seventy-eight billion, three hundred thirty-two million, nine hundred nineteen thousand, nine hundred thirty-eight".