61056643 has 2 divisors, whose sum is σ = 61056644. Its totient is φ = 61056642.

The previous prime is 61056551. The next prime is 61056659. The reversal of 61056643 is 34665016.

61056643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61056643 is a prime.

It is not a weakly prime, because it can be changed into another prime (61056683) 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 as a sum of consecutive naturals, namely, 30528321 + 30528322.

It is an arithmetic number, because the mean of its divisors is an integer number (30528322).

Almost surely, 2^61056643 is an apocalyptic number.

61056643 is a deficient number, since it is larger than the sum of its proper divisors (1).

61056643 is an equidigital number, since it uses as much as digits as its factorization.

61056643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 61056643 is about 7813.8750309945. The cubic root of 61056643 is about 393.7715248836.

The spelling of 61056643 in words is "sixty-one million, fifty-six thousand, six hundred forty-three".