8404756649691 has 8 divisors (see below), whose sum is σ = 11364178005504. Its totient is φ = 5524253196840.

The previous prime is 8404756649687. The next prime is 8404756649701. The reversal of 8404756649691 is 1969466574048.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8404756649691 - 2² = 8404756649687 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8404756649651) 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, 19729475491 + ... + 19729475916.

It is an arithmetic number, because the mean of its divisors is an integer number (1420522250688).

Almost surely, 2^{8404756649691} is an apocalyptic number.

8404756649691 is a deficient number, since it is larger than the sum of its proper divisors (2959421355813).

8404756649691 is a wasteful number, since it uses less digits than its factorization.

8404756649691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39458951481.

The product of its (nonzero) digits is 313528320, while the sum is 69.

The spelling of 8404756649691 in words is "eight trillion, four hundred four billion, seven hundred fifty-six million, six hundred forty-nine thousand, six hundred ninety-one".