61454305243 has 2 divisors, whose sum is σ = 61454305244. Its totient is φ = 61454305242.

The previous prime is 61454305219. The next prime is 61454305249. The reversal of 61454305243 is 34250345416.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61454305243 is a prime.

It is not a weakly prime, because it can be changed into another prime (61454305249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30727152621 + 30727152622.

It is an arithmetic number, because the mean of its divisors is an integer number (30727152622).

Almost surely, 2^61454305243 is an apocalyptic number.

61454305243 is a deficient number, since it is larger than the sum of its proper divisors (1).

61454305243 is an equidigital number, since it uses as much as digits as its factorization.

61454305243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172800, while the sum is 37.

The spelling of 61454305243 in words is "sixty-one billion, four hundred fifty-four million, three hundred five thousand, two hundred forty-three".