61709360 has 40 divisors (see below), whose sum is σ = 144886560. Its totient is φ = 24440832.

The previous prime is 61709357. The next prime is 61709381. The reversal of 61709360 is 6390716.

61709360 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×61709360² = 7616090223219200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4496 + ... + 11984.

It is an arithmetic number, because the mean of its divisors is an integer number (3622164).

Almost surely, 2^61709360 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 61709360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72443280).

61709360 is an abundant number, since it is smaller than the sum of its proper divisors (83177200).

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

61709360 is a wasteful number, since it uses less digits than its factorization.

61709360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7605 (or 7599 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 61709360 is about 7855.5305358709. The cubic root of 61709360 is about 395.1697395790.

The spelling of 61709360 in words is "sixty-one million, seven hundred nine thousand, three hundred sixty".