82378729988 has 6 divisors (see below), whose sum is σ = 144162777486. Its totient is φ = 41189364992.

The previous prime is 82378729981. The next prime is 82378730053. The reversal of 82378729988 is 88992787328.

It can be written as a sum of positive squares in only one way, i.e., 71549830144 + 10828899844 = 267488^2 + 104062^2 .

It is not an unprimeable number, because it can be changed into a prime (82378729981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10297341245 + ... + 10297341252.

It is an arithmetic number, because the mean of its divisors is an integer number (24027129581).

Almost surely, 2^82378729988 is an apocalyptic number.

It is an amenable number.

82378729988 is a deficient number, since it is larger than the sum of its proper divisors (61784047498).

82378729988 is a wasteful number, since it uses less digits than its factorization.

82378729988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20594682501 (or 20594682499 counting only the distinct ones).

The product of its digits is 195084288, while the sum is 71.

The spelling of 82378729988 in words is "eighty-two billion, three hundred seventy-eight million, seven hundred twenty-nine thousand, nine hundred eighty-eight".