63509980 has 24 divisors (see below), whose sum is σ = 133520688. Its totient is φ = 25375488.

The previous prime is 63509947. The next prime is 63509981. The reversal of 63509980 is 8990536.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63509981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34647 + ... + 36433.

It is an arithmetic number, because the mean of its divisors is an integer number (5563362).

Almost surely, 2^63509980 is an apocalyptic number.

It is an amenable number.

63509980 is an abundant number, since it is smaller than the sum of its proper divisors (70010708).

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

63509980 is a wasteful number, since it uses less digits than its factorization.

63509980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3573 (or 3571 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 63509980 is about 7969.3149015458. The cubic root of 63509980 is about 398.9765083960.

The spelling of 63509980 in words is "sixty-three million, five hundred nine thousand, nine hundred eighty".