61644684 has 12 divisors (see below), whose sum is σ = 143837624. Its totient is φ = 20548224.

The previous prime is 61644617. The next prime is 61644697. The reversal of 61644684 is 48644616.

It is a tau number, because it is divible by the number of its divisors (12).

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, 2568517 + ... + 2568540.

Almost surely, 2^61644684 is an apocalyptic number.

It is an amenable number.

61644684 is an abundant number, since it is smaller than the sum of its proper divisors (82192940).

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

61644684 is a wasteful number, since it uses less digits than its factorization.

61644684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5137064 (or 5137062 counting only the distinct ones).

The product of its digits is 110592, while the sum is 39.

The square root of 61644684 is about 7851.4128664846. The cubic root of 61644684 is about 395.0316355584.

The spelling of 61644684 in words is "sixty-one million, six hundred forty-four thousand, six hundred eighty-four".