61039616 has 44 divisors (see below), whose sum is σ = 133136880. Its totient is φ = 27740160.

The previous prime is 61039591. The next prime is 61039633. The reversal of 61039616 is 61693016.

It is a tau number, because it is divible by the number of its divisors (44).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a nialpdrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8555 + ... + 13973.

Almost surely, 2^61039616 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 61039616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66568440).

61039616 is an abundant number, since it is smaller than the sum of its proper divisors (72097264).

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

61039616 is a wasteful number, since it uses less digits than its factorization.

61039616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5450 (or 5432 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 61039616 is about 7812.7854187863. The cubic root of 61039616 is about 393.7349175041.

The spelling of 61039616 in words is "sixty-one million, thirty-nine thousand, six hundred sixteen".