61321604 has 6 divisors (see below), whose sum is σ = 107312814. Its totient is φ = 30660800.

The previous prime is 61321541. The next prime is 61321613. The reversal of 61321604 is 40612316.

It is a happy number.

61321604 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 46267204 + 15054400 = 6802^2 + 3880^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 61321604.

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 as a sum of consecutive naturals, namely, 7665197 + ... + 7665204.

It is an arithmetic number, because the mean of its divisors is an integer number (17885469).

Almost surely, 2^61321604 is an apocalyptic number.

It is an amenable number.

61321604 is a deficient number, since it is larger than the sum of its proper divisors (45991210).

61321604 is a wasteful number, since it uses less digits than its factorization.

61321604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15330405 (or 15330403 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 61321604 is about 7830.8111968046. The cubic root of 61321604 is about 394.3403056756.

The spelling of 61321604 in words is "sixty-one million, three hundred twenty-one thousand, six hundred four".