61216584 has 64 divisors (see below), whose sum is σ = 179807040. Its totient is φ = 17122560.

The previous prime is 61216583. The next prime is 61216591. The reversal of 61216584 is 48561216.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (61216583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5487 + ... + 12350.

It is an arithmetic number, because the mean of its divisors is an integer number (2809485).

Almost surely, 2^61216584 is an apocalyptic number.

It is an amenable number.

61216584 is an abundant number, since it is smaller than the sum of its proper divisors (118590456).

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

61216584 is a wasteful number, since it uses less digits than its factorization.

61216584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17870 (or 17866 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 61216584 is about 7824.1027600614. The cubic root of 61216584 is about 394.1150599737.

The spelling of 61216584 in words is "sixty-one million, two hundred sixteen thousand, five hundred eighty-four".