63745780 has 48 divisors (see below), whose sum is σ = 156562560. Its totient is φ = 21345408.

The previous prime is 63745763. The next prime is 63745789. The reversal of 63745780 is 8754736.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63745789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 726 + ... + 11314.

It is an arithmetic number, because the mean of its divisors is an integer number (3261720).

Almost surely, 2^63745780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63745780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78281280).

63745780 is an abundant number, since it is smaller than the sum of its proper divisors (92816780).

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

63745780 is a wasteful number, since it uses less digits than its factorization.

63745780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10648 (or 10646 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 63745780 is about 7984.0954403113. The cubic root of 63745780 is about 399.4696721918.

The spelling of 63745780 in words is "sixty-three million, seven hundred forty-five thousand, seven hundred eighty".