81749674603 has 2 divisors, whose sum is σ = 81749674604. Its totient is φ = 81749674602.

The previous prime is 81749674549. The next prime is 81749674621. The reversal of 81749674603 is 30647694718.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81749674603 - 2²¹ = 81747577451 is a prime.

It is not a weakly prime, because it can be changed into another prime (81749674673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40874837301 + 40874837302.

It is an arithmetic number, because the mean of its divisors is an integer number (40874837302).

Almost surely, 2^81749674603 is an apocalyptic number.

81749674603 is a deficient number, since it is larger than the sum of its proper divisors (1).

81749674603 is an equidigital number, since it uses as much as digits as its factorization.

81749674603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6096384, while the sum is 55.

The spelling of 81749674603 in words is "eighty-one billion, seven hundred forty-nine million, six hundred seventy-four thousand, six hundred three".