8400786191985 has 32 divisors (see below), whose sum is σ = 14753148715008. Its totient is φ = 4048120048320.

The previous prime is 8400786191957. The next prime is 8400786192023. The reversal of 8400786191985 is 5891916870048.

It is not a de Polignac number, because 8400786191985 - 2⁵ = 8400786191953 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156150577 + ... + 156204366.

It is an arithmetic number, because the mean of its divisors is an integer number (461035897344).

Almost surely, 2^{8400786191985} is an apocalyptic number.

It is an amenable number.

8400786191985 is a deficient number, since it is larger than the sum of its proper divisors (6352362523023).

8400786191985 is a wasteful number, since it uses less digits than its factorization.

8400786191985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312355125.

The product of its (nonzero) digits is 34836480, while the sum is 66.

The spelling of 8400786191985 in words is "eight trillion, four hundred billion, seven hundred eighty-six million, one hundred ninety-one thousand, nine hundred eighty-five".