7861804739882 has 64 divisors (see below), whose sum is σ = 12980201542560. Its totient is φ = 3556063420416.

The previous prime is 7861804739869. The next prime is 7861804739923. The reversal of 7861804739882 is 2889374081687.

It is a Cunningham number, because it is equal to 2803891²+1.

It can be written as a sum of positive squares in 16 ways, for example, as 2304418116961 + 5557386622921 = 1518031^2 + 2357411^2 .

It is a super-3 number, since 3×7861804739882³ (a number of 40 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34053494 + ... + 34283582.

Almost surely, 2^{7861804739882} is an apocalyptic number.

7861804739882 is a deficient number, since it is larger than the sum of its proper divisors (5118396802678).

7861804739882 is a wasteful number, since it uses less digits than its factorization.

7861804739882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230475.

The product of its (nonzero) digits is 260112384, while the sum is 71.

The spelling of 7861804739882 in words is "seven trillion, eight hundred sixty-one billion, eight hundred four million, seven hundred thirty-nine thousand, eight hundred eighty-two".