805239152640 has 448 divisors, whose sum is σ = 3083175748800. Its totient is φ = 198209175552.

The previous prime is 805239152623. The next prime is 805239152651. The reversal of 805239152640 is 46251932508.

805239152640 is a `hidden beast` number, since 8 + 0 + 52 + 39 + 1 + 526 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

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, 14348956 + ... + 14404964.

It is an arithmetic number, because the mean of its divisors is an integer number (6882088725).

Almost surely, 2^805239152640 is an apocalyptic number.

805239152640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 805239152640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1541587874400).

805239152640 is an abundant number, since it is smaller than the sum of its proper divisors (2277936596160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

805239152640 is a wasteful number, since it uses less digits than its factorization.

805239152640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56062 (or 56032 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 805239152640 in words is "eight hundred five billion, two hundred thirty-nine million, one hundred fifty-two thousand, six hundred forty".