61716984 has 64 divisors (see below), whose sum is σ = 177949440. Its totient is φ = 17472000.

The previous prime is 61716947. The next prime is 61717031. The reversal of 61716984 is 48961716.

It is a super-2 number, since 2×61716984² = 7617972228112512, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17359 + ... + 20609.

It is an arithmetic number, because the mean of its divisors is an integer number (2780460).

Almost surely, 2^61716984 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 61716984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88974720).

61716984 is an abundant number, since it is smaller than the sum of its proper divisors (116232456).

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

61716984 is a wasteful number, since it uses less digits than its factorization.

61716984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3380 (or 3376 counting only the distinct ones).

The product of its digits is 72576, while the sum is 42.

The square root of 61716984 is about 7856.0157840982. The cubic root of 61716984 is about 395.1860129074.

The spelling of 61716984 in words is "sixty-one million, seven hundred sixteen thousand, nine hundred eighty-four".