61804636 has 6 divisors (see below), whose sum is σ = 108158120. Its totient is φ = 30902316.

The previous prime is 61804573. The next prime is 61804637. The reversal of 61804636 is 63640816.

61804636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61804637) 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 as a sum of consecutive naturals, namely, 7725576 + ... + 7725583.

Almost surely, 2^61804636 is an apocalyptic number.

It is an amenable number.

61804636 is a deficient number, since it is larger than the sum of its proper divisors (46353484).

61804636 is a wasteful number, since it uses less digits than its factorization.

61804636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15451163 (or 15451161 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 61804636 is about 7861.5924595466. The cubic root of 61804636 is about 395.3730087539.

It can be divided in two parts, 6180 and 4636, that added together give a square (10816 = 104²).

The spelling of 61804636 in words is "sixty-one million, eight hundred four thousand, six hundred thirty-six".