61653812 has 24 divisors (see below), whose sum is σ = 119199360. Its totient is φ = 27668160.

The previous prime is 61653799. The next prime is 61653821. The reversal of 61653812 is 21835616.

It is a happy number.

61653812 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 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 7 ways as a sum of consecutive naturals, for example, 5393 + ... + 12344.

It is an arithmetic number, because the mean of its divisors is an integer number (4966640).

Almost surely, 2^61653812 is an apocalyptic number.

It is an amenable number.

61653812 is a deficient number, since it is larger than the sum of its proper divisors (57545548).

61653812 is a wasteful number, since it uses less digits than its factorization.

61653812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17831 (or 17829 counting only the distinct ones).

The product of its digits is 8640, while the sum is 32.

The square root of 61653812 is about 7851.9941416178. The cubic root of 61653812 is about 395.0511326211.

The spelling of 61653812 in words is "sixty-one million, six hundred fifty-three thousand, eight hundred twelve".