61405443 has 36 divisors (see below), whose sum is σ = 98553000. Its totient is φ = 36812160.

The previous prime is 61405417. The next prime is 61405447. The reversal of 61405443 is 34450416.

61405443 is a `hidden beast` number, since 614 + 0 + 5 + 4 + 43 = 666.

61405443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61405443 - 2⁸ = 61405187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61405447) 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 in 35 ways as a sum of consecutive naturals, for example, 122808 + ... + 123306.

Almost surely, 2^61405443 is an apocalyptic number.

61405443 is a deficient number, since it is larger than the sum of its proper divisors (37147557).

61405443 is a wasteful number, since it uses less digits than its factorization.

61405443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640 (or 626 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 61405443 is about 7836.1625174571. The cubic root of 61405443 is about 394.5199380787.

Adding to 61405443 its reverse (34450416), we get a palindrome (95855859).

It can be divided in two parts, 61 and 405443, that added together give a palindrome (405504).

The spelling of 61405443 in words is "sixty-one million, four hundred five thousand, four hundred forty-three".