63715540 has 96 divisors (see below), whose sum is σ = 161409024. Its totient is φ = 20666880.

The previous prime is 63715511. The next prime is 63715567. The reversal of 63715540 is 4551736.

63715540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 229882 + ... + 230158.

It is an arithmetic number, because the mean of its divisors is an integer number (1681344).

Almost surely, 2^63715540 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 63715540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80704512).

63715540 is an abundant number, since it is smaller than the sum of its proper divisors (97693484).

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

63715540 is a wasteful number, since it uses less digits than its factorization.

63715540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 63715540 is about 7982.2014507277. The cubic root of 63715540 is about 399.4064948145.

It can be divided in two parts, 6371 and 5540, that added together give a palindrome (11911).

The spelling of 63715540 in words is "sixty-three million, seven hundred fifteen thousand, five hundred forty".