806619534399 has 72 divisors (see below), whose sum is σ = 1374986676960. Its totient is φ = 454254054912.

The previous prime is 806619534377. The next prime is 806619534499. The reversal of 806619534399 is 993435916608.

806619534399 is a `hidden beast` number, since 8 + 0 + 6 + 6 + 1 + 9 + 534 + 3 + 99 = 666.

It is a Cunningham number, because it is equal to 898120²-1.

It is not a de Polignac number, because 806619534399 - 2⁵ = 806619534367 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (806619534499) 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 71 ways as a sum of consecutive naturals, for example, 43998667 + ... + 44016995.

It is an arithmetic number, because the mean of its divisors is an integer number (19097037180).

Almost surely, 2^806619534399 is an apocalyptic number.

806619534399 is a deficient number, since it is larger than the sum of its proper divisors (568367142561).

806619534399 is a wasteful number, since it uses less digits than its factorization.

806619534399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19789 (or 19779 counting only the distinct ones).

The product of its (nonzero) digits is 37791360, while the sum is 63.

The spelling of 806619534399 in words is "eight hundred six billion, six hundred nineteen million, five hundred thirty-four thousand, three hundred ninety-nine".