8400885498991 has 2 divisors, whose sum is σ = 8400885498992. Its totient is φ = 8400885498990.

The previous prime is 8400885498931. The next prime is 8400885499031. The reversal of 8400885498991 is 1998945880048.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8400885498991 - 2¹⁵ = 8400885466223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8400885498931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4200442749495 + 4200442749496.

It is an arithmetic number, because the mean of its divisors is an integer number (4200442749496).

Almost surely, 2^{8400885498991} is an apocalyptic number.

8400885498991 is a deficient number, since it is larger than the sum of its proper divisors (1).

8400885498991 is an equidigital number, since it uses as much as digits as its factorization.

8400885498991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 238878720, while the sum is 73.

The spelling of 8400885498991 in words is "eight trillion, four hundred billion, eight hundred eighty-five million, four hundred ninety-eight thousand, nine hundred ninety-one".