61689604 has 12 divisors (see below), whose sum is σ = 108020304. Its totient is φ = 30826664.

The previous prime is 61689587. The next prime is 61689629. The reversal of 61689604 is 40698616.

61689604 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3 ways as a sum of consecutive naturals, for example, 5667 + ... + 12469.

It is an arithmetic number, because the mean of its divisors is an integer number (9001692).

Almost surely, 2^61689604 is an apocalyptic number.

It is an amenable number.

61689604 is a deficient number, since it is larger than the sum of its proper divisors (46330700).

61689604 is a wasteful number, since it uses less digits than its factorization.

61689604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9074 (or 9072 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 61689604 is about 7854.2729771762. The cubic root of 61689604 is about 395.1275644177.

The spelling of 61689604 in words is "sixty-one million, six hundred eighty-nine thousand, six hundred four".