61443805 has 8 divisors (see below), whose sum is σ = 75301632. Its totient is φ = 48109008.

The previous prime is 61443799. The next prime is 61443827. The reversal of 61443805 is 50834416.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61443805 - 2⁵ = 61443773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130497 + ... + 130966.

It is an arithmetic number, because the mean of its divisors is an integer number (9412704).

Almost surely, 2^61443805 is an apocalyptic number.

It is an amenable number.

61443805 is a deficient number, since it is larger than the sum of its proper divisors (13857827).

61443805 is a wasteful number, since it uses less digits than its factorization.

61443805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261515.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 61443805 is about 7838.6098895148. The cubic root of 61443805 is about 394.6020775033.

The spelling of 61443805 in words is "sixty-one million, four hundred forty-three thousand, eight hundred five".