63920585040 has 160 divisors (see below), whose sum is σ = 213518833920. Its totient is φ = 15725273088.

The previous prime is 63920585039. The next prime is 63920585051. The reversal of 63920585040 is 4058502936.

It is a junction number, because it is equal to n+sod(n) for n = 63920584983 and 63920585001.

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, 6637669 + ... + 6647291.

It is an arithmetic number, because the mean of its divisors is an integer number (1334492712).

Almost surely, 2^63920585040 is an apocalyptic number.

63920585040 is a gapful number since it is divisible by the number (60) 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 63920585040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106759416960).

63920585040 is an abundant number, since it is smaller than the sum of its proper divisors (149598248880).

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

63920585040 is a wasteful number, since it uses less digits than its factorization.

63920585040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11781 (or 11775 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 63920585040 in words is "sixty-three billion, nine hundred twenty million, five hundred eighty-five thousand, forty".