81574883759 has 2 divisors, whose sum is σ = 81574883760. Its totient is φ = 81574883758.

The previous prime is 81574883749. The next prime is 81574883773. The reversal of 81574883759 is 95738847518.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81574883759 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81574883695 and 81574883704.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81574883729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40787441879 + 40787441880.

It is an arithmetic number, because the mean of its divisors is an integer number (40787441880).

Almost surely, 2^81574883759 is an apocalyptic number.

81574883759 is a deficient number, since it is larger than the sum of its proper divisors (1).

81574883759 is an equidigital number, since it uses as much as digits as its factorization.

81574883759 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67737600, while the sum is 65.

The spelling of 81574883759 in words is "eighty-one billion, five hundred seventy-four million, eight hundred eighty-three thousand, seven hundred fifty-nine".