63640080 has 400 divisors, whose sum is σ = 267911424. Its totient is φ = 13685760.

The previous prime is 63640079. The next prime is 63640127. The reversal of 63640080 is 8004636.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1043250 + ... + 1043310.

Almost surely, 2^63640080 is an apocalyptic number.

63640080 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 63640080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133955712).

63640080 is an abundant number, since it is smaller than the sum of its proper divisors (204271344).

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

63640080 is a wasteful number, since it uses less digits than its factorization.

63640080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 63640080 is about 7977.4732841922. The cubic root of 63640080 is about 399.2487566335.

The spelling of 63640080 in words is "sixty-three million, six hundred forty thousand, eighty".