7778381282 has 16 divisors (see below), whose sum is σ = 13341554880. Its totient is φ = 3331795248.

The previous prime is 7778381243. The next prime is 7778381287. The reversal of 7778381282 is 2821838777.

It is not an unprimeable number, because it can be changed into a prime (7778381287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122657 + ... + 174932.

It is an arithmetic number, because the mean of its divisors is an integer number (833847180).

Almost surely, 2^7778381282 is an apocalyptic number.

7778381282 is a deficient number, since it is larger than the sum of its proper divisors (5563173598).

7778381282 is a wasteful number, since it uses less digits than its factorization.

7778381282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299465.

The product of its digits is 2107392, while the sum is 53.

The square root of 7778381282 is about 88195.1318497796. The cubic root of 7778381282 is about 1981.3585617194.

The spelling of 7778381282 in words is "seven billion, seven hundred seventy-eight million, three hundred eighty-one thousand, two hundred eighty-two".