827240686640 has 80 divisors (see below), whose sum is σ = 2015010554880. Its totient is φ = 315442702080.

The previous prime is 827240686627. The next prime is 827240686681. The reversal of 827240686640 is 46686042728.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2323130 + ... + 2655449.

It is an arithmetic number, because the mean of its divisors is an integer number (25187631936).

Almost surely, 2^827240686640 is an apocalyptic number.

827240686640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

827240686640 is an abundant number, since it is smaller than the sum of its proper divisors (1187769868240).

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

827240686640 is a wasteful number, since it uses less digits than its factorization.

827240686640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4978690 (or 4978684 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 53.

The spelling of 827240686640 in words is "eight hundred twenty-seven billion, two hundred forty million, six hundred eighty-six thousand, six hundred forty".