63820508840 has 64 divisors (see below), whose sum is σ = 160293418560. Its totient is φ = 22667742720.

The previous prime is 63820508839. The next prime is 63820508863. The reversal of 63820508840 is 4880502836.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 63820508791 and 63820508800.

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, 1667669 + ... + 1705508.

It is an arithmetic number, because the mean of its divisors is an integer number (2504584665).

Almost surely, 2^63820508840 is an apocalyptic number.

It is an amenable number.

63820508840 is an abundant number, since it is smaller than the sum of its proper divisors (96472909720).

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

63820508840 is a wasteful number, since it uses less digits than its factorization.

63820508840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3373242 (or 3373238 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 44.

The spelling of 63820508840 in words is "sixty-three billion, eight hundred twenty million, five hundred eight thousand, eight hundred forty".