61216563 has 8 divisors (see below), whose sum is σ = 83520448. Its totient is φ = 39861864.

The previous prime is 61216549. The next prime is 61216583. The reversal of 61216563 is 36561216.

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

It is not a de Polignac number, because 61216563 - 2⁵ = 61216531 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 61216563.

It is not an unprimeable number, because it can be changed into a prime (61216523) 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, 237145 + ... + 237402.

It is an arithmetic number, because the mean of its divisors is an integer number (10440056).

Almost surely, 2^61216563 is an apocalyptic number.

61216563 is a deficient number, since it is larger than the sum of its proper divisors (22303885).

61216563 is a wasteful number, since it uses less digits than its factorization.

61216563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474593.

The product of its digits is 6480, while the sum is 30.

The square root of 61216563 is about 7824.1014180543. The cubic root of 61216563 is about 394.1150149074.

Adding to 61216563 its reverse (36561216), we get a palindrome (97777779).

The spelling of 61216563 in words is "sixty-one million, two hundred sixteen thousand, five hundred sixty-three".