8404756649687 has 2 divisors, whose sum is σ = 8404756649688. Its totient is φ = 8404756649686.

The previous prime is 8404756649651. The next prime is 8404756649701. The reversal of 8404756649687 is 7869466574048.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8404756649687 - 2²⁴ = 8404739872471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8404756649987) 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 as a sum of consecutive naturals, namely, 4202378324843 + 4202378324844.

It is an arithmetic number, because the mean of its divisors is an integer number (4202378324844).

Almost surely, 2^{8404756649687} is an apocalyptic number.

8404756649687 is a deficient number, since it is larger than the sum of its proper divisors (1).

8404756649687 is an equidigital number, since it uses as much as digits as its factorization.

8404756649687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1950842880, while the sum is 74.

The spelling of 8404756649687 in words is "eight trillion, four hundred four billion, seven hundred fifty-six million, six hundred forty-nine thousand, six hundred eighty-seven".