61945816 has 16 divisors (see below), whose sum is σ = 116233200. Its totient is φ = 30950304.

The previous prime is 61945813. The next prime is 61945837. The reversal of 61945816 is 61854916.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61945813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17005 + ... + 20323.

It is an arithmetic number, because the mean of its divisors is an integer number (7264575).

Almost surely, 2^61945816 is an apocalyptic number.

It is an amenable number.

61945816 is a deficient number, since it is larger than the sum of its proper divisors (54287384).

61945816 is a wasteful number, since it uses less digits than its factorization.

61945816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5658 (or 5654 counting only the distinct ones).

The product of its digits is 51840, while the sum is 40.

The square root of 61945816 is about 7870.5664345077. The cubic root of 61945816 is about 395.6738293001.

The spelling of 61945816 in words is "sixty-one million, nine hundred forty-five thousand, eight hundred sixteen".