61725636 has 36 divisors (see below), whose sum is σ = 178319232. Its totient is φ = 17635824.

The previous prime is 61725611. The next prime is 61725641. The reversal of 61725636 is 63652716.

61725636 is a `hidden beast` number, since 6 + 17 + 2 + 5 + 636 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 61725636.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 122220 + ... + 122723.

It is an arithmetic number, because the mean of its divisors is an integer number (4953312).

Almost surely, 2^61725636 is an apocalyptic number.

It is an amenable number.

61725636 is an abundant number, since it is smaller than the sum of its proper divisors (116593596).

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

61725636 is a wasteful number, since it uses less digits than its factorization.

61725636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244960 (or 244955 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 61725636 is about 7856.5664256086. The cubic root of 61725636 is about 395.2044788649.

The spelling of 61725636 in words is "sixty-one million, seven hundred twenty-five thousand, six hundred thirty-six".