7821675782 has 16 divisors (see below), whose sum is σ = 12528604800. Its totient is φ = 3654174720.

The previous prime is 7821675781. The next prime is 7821675847. The reversal of 7821675782 is 2875761287.

It is a super-2 number, since 2×7821675782² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7821675781) 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, 2173307 + ... + 2176902.

It is an arithmetic number, because the mean of its divisors is an integer number (783037800).

Almost surely, 2^7821675782 is an apocalyptic number.

7821675782 is a deficient number, since it is larger than the sum of its proper divisors (4706929018).

7821675782 is a wasteful number, since it uses less digits than its factorization.

7821675782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4350271.

The product of its digits is 2634240, while the sum is 53.

The square root of 7821675782 is about 88440.2384777427. The cubic root of 7821675782 is about 1985.0278454811.

The spelling of 7821675782 in words is "seven billion, eight hundred twenty-one million, six hundred seventy-five thousand, seven hundred eighty-two".