63641418 has 16 divisors (see below), whose sum is σ = 129076416. Its totient is φ = 20914880.

The previous prime is 63641401. The next prime is 63641423. The reversal of 63641418 is 81414636.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74271 + ... + 75122.

It is an arithmetic number, because the mean of its divisors is an integer number (8067276).

Almost surely, 2^63641418 is an apocalyptic number.

63641418 is an abundant number, since it is smaller than the sum of its proper divisors (65434998).

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

63641418 is a wasteful number, since it uses less digits than its factorization.

63641418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149469.

The product of its digits is 13824, while the sum is 33.

The square root of 63641418 is about 7977.5571448909. The cubic root of 63641418 is about 399.2515546139.

The spelling of 63641418 in words is "sixty-three million, six hundred forty-one thousand, four hundred eighteen".