63920732040 has 448 divisors, whose sum is σ = 236324088000. Its totient is φ = 15424473600.

The previous prime is 63920731999. The next prime is 63920732047. The reversal of 63920732040 is 4023702936.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 63920731986 and 63920732004.

It is not an unprimeable number, because it can be changed into a prime (63920732047) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 111944955 + ... + 111945525.

It is an arithmetic number, because the mean of its divisors is an integer number (527509125).

Almost surely, 2^63920732040 is an apocalyptic number.

63920732040 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 63920732040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118162044000).

63920732040 is an abundant number, since it is smaller than the sum of its proper divisors (172403355960).

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

63920732040 is a wasteful number, since it uses less digits than its factorization.

63920732040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960 (or 941 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

The spelling of 63920732040 in words is "sixty-three billion, nine hundred twenty million, seven hundred thirty-two thousand, forty".