8400491666259 has 32 divisors (see below), whose sum is σ = 14025971183616. Its totient is φ = 4344667554720.

The previous prime is 8400491666249. The next prime is 8400491666321. The reversal of 8400491666259 is 9526661940048.

It is not a de Polignac number, because 8400491666259 - 2⁷ = 8400491666131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8400491666219) 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 31 ways as a sum of consecutive naturals, for example, 80048367 + ... + 80153240.

It is an arithmetic number, because the mean of its divisors is an integer number (438311599488).

Almost surely, 2^{8400491666259} is an apocalyptic number.

8400491666259 is a deficient number, since it is larger than the sum of its proper divisors (5625479517357).

8400491666259 is a wasteful number, since it uses less digits than its factorization.

8400491666259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160201855.

The product of its (nonzero) digits is 22394880, while the sum is 60.

The spelling of 8400491666259 in words is "eight trillion, four hundred billion, four hundred ninety-one million, six hundred sixty-six thousand, two hundred fifty-nine".