63540064 has 60 divisors (see below), whose sum is σ = 146111364. Its totient is φ = 27198528.

The previous prime is 63540041. The next prime is 63540077. The reversal of 63540064 is 46004536.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a nialpdrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 76419 + ... + 77245.

Almost surely, 2^63540064 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 63540064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73055682).

63540064 is an abundant number, since it is smaller than the sum of its proper divisors (82571300).

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

63540064 is an frugal number, since it uses more digits than its factorization.

63540064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865 (or 836 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 63540064 is about 7971.2021678038. The cubic root of 63540064 is about 399.0394954235.

The spelling of 63540064 in words is "sixty-three million, five hundred forty thousand, sixty-four".