61255643 has 2 divisors, whose sum is σ = 61255644. Its totient is φ = 61255642.

The previous prime is 61255613. The next prime is 61255657. The reversal of 61255643 is 34655216.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61255643 - 2¹⁰ = 61254619 is a prime.

It is not a weakly prime, because it can be changed into another prime (61255613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30627821 + 30627822.

It is an arithmetic number, because the mean of its divisors is an integer number (30627822).

Almost surely, 2^61255643 is an apocalyptic number.

61255643 is a deficient number, since it is larger than the sum of its proper divisors (1).

61255643 is an equidigital number, since it uses as much as digits as its factorization.

61255643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 32.

The square root of 61255643 is about 7826.5984309916. The cubic root of 61255643 is about 394.1988633393.

The spelling of 61255643 in words is "sixty-one million, two hundred fifty-five thousand, six hundred forty-three".