61641646 has 32 divisors (see below), whose sum is σ = 105753600. Its totient is φ = 26688480.

The previous prime is 61641637. The next prime is 61641647. The reversal of 61641646 is 64614616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61641647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49791 + ... + 51013.

It is an arithmetic number, because the mean of its divisors is an integer number (3304800).

Almost surely, 2^61641646 is an apocalyptic number.

61641646 is a deficient number, since it is larger than the sum of its proper divisors (44111954).

61641646 is a wasteful number, since it uses less digits than its factorization.

61641646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344.

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

The square root of 61641646 is about 7851.2193957372. The cubic root of 61641646 is about 395.0251460785.

The spelling of 61641646 in words is "sixty-one million, six hundred forty-one thousand, six hundred forty-six".