61704560 has 80 divisors (see below), whose sum is σ = 154677600. Its totient is φ = 22806528.

The previous prime is 61704557. The next prime is 61704563. The reversal of 61704560 is 6540716.

61704560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61704557) and next prime (61704563).

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61704563) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 79856 + ... + 80624.

It is an arithmetic number, because the mean of its divisors is an integer number (1933470).

Almost surely, 2^61704560 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 61704560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77338800).

61704560 is an abundant number, since it is smaller than the sum of its proper divisors (92973040).

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

61704560 is a wasteful number, since it uses less digits than its factorization.

61704560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858 (or 852 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 61704560 is about 7855.2250126906. The cubic root of 61704560 is about 395.1594933542.

The spelling of 61704560 in words is "sixty-one million, seven hundred four thousand, five hundred sixty".