805158471920 has 80 divisors (see below), whose sum is σ = 2149657591680. Its totient is φ = 277375161600.

The previous prime is 805158471911. The next prime is 805158471973. The reversal of 805158471920 is 29174851508.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 24060986 + ... + 24094425.

It is an arithmetic number, because the mean of its divisors is an integer number (26870719896).

Almost surely, 2^805158471920 is an apocalyptic number.

805158471920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

805158471920 is an abundant number, since it is smaller than the sum of its proper divisors (1344499119760).

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

805158471920 is a wasteful number, since it uses less digits than its factorization.

805158471920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48155454 (or 48155448 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 50.

The spelling of 805158471920 in words is "eight hundred five billion, one hundred fifty-eight million, four hundred seventy-one thousand, nine hundred twenty".