63615 has 8 divisors (see below), whose sum is σ = 101808. Its totient is φ = 33920.

The previous prime is 63611. The next prime is 63617. The reversal of 63615 is 51636.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 63615 - 2² = 63611 is a prime.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 63591 and 63600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63611) 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, 2106 + ... + 2135.

It is an arithmetic number, because the mean of its divisors is an integer number (12726).

2⁶³⁶¹⁵ is an apocalyptic number.

63615 is a deficient number, since it is larger than the sum of its proper divisors (38193).

63615 is a wasteful number, since it uses less digits than its factorization.

63615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4249.

The product of its digits is 540, while the sum is 21.

The square root of 63615 is about 252.2201419395. The cubic root of 63615 is about 39.9196302926.

Adding to 63615 its sum of digits (21), we get a palindrome (63636).

The spelling of 63615 in words is "sixty-three thousand, six hundred fifteen".