63825921840 has 80 divisors (see below), whose sum is σ = 206462999808. Its totient is φ = 16280233728.

The previous prime is 63825921823. The next prime is 63825921851. The reversal of 63825921840 is 4812952836.

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

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 63825921840.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5775814 + ... + 5786853.

Almost surely, 2^63825921840 is an apocalyptic number.

63825921840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

63825921840 is an abundant number, since it is smaller than the sum of its proper divisors (142637077968).

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

63825921840 is a wasteful number, since it uses less digits than its factorization.

63825921840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11562706 (or 11562700 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 63825921840 in words is "sixty-three billion, eight hundred twenty-five million, nine hundred twenty-one thousand, eight hundred forty".