7987106909820 has 24 divisors (see below), whose sum is σ = 22363899347664. Its totient is φ = 2129895175936.

The previous prime is 7987106909807. The next prime is 7987106909827. The reversal of 7987106909820 is 289096017897.

It is a super-2 number, since 2×7987106909820² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7987106909827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66559224189 + ... + 66559224308.

It is an arithmetic number, because the mean of its divisors is an integer number (931829139486).

Almost surely, 2^{7987106909820} is an apocalyptic number.

It is an amenable number.

7987106909820 is an abundant number, since it is smaller than the sum of its proper divisors (14376792437844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7987106909820 is a wasteful number, since it uses less digits than its factorization.

7987106909820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133118448509 (or 133118448507 counting only the distinct ones).

The product of its (nonzero) digits is 27433728, while the sum is 66.

The spelling of 7987106909820 in words is "seven trillion, nine hundred eighty-seven billion, one hundred six million, nine hundred nine thousand, eight hundred twenty".