61291044383 has 2 divisors, whose sum is σ = 61291044384. Its totient is φ = 61291044382.

The previous prime is 61291044317. The next prime is 61291044403. The reversal of 61291044383 is 38344019216.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61291044383 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61291044383.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61291044083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30645522191 + 30645522192.

It is an arithmetic number, because the mean of its divisors is an integer number (30645522192).

Almost surely, 2^61291044383 is an apocalyptic number.

61291044383 is a deficient number, since it is larger than the sum of its proper divisors (1).

61291044383 is an equidigital number, since it uses as much as digits as its factorization.

61291044383 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 41.

The spelling of 61291044383 in words is "sixty-one billion, two hundred ninety-one million, forty-four thousand, three hundred eighty-three".