81092968153 has 2 divisors, whose sum is σ = 81092968154. Its totient is φ = 81092968152.

The previous prime is 81092968109. The next prime is 81092968189. The reversal of 81092968153 is 35186929018.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76921358409 + 4171609744 = 277347^2 + 64588^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81092968153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81092968153.

It is not a weakly prime, because it can be changed into another prime (81092998153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40546484076 + 40546484077.

It is an arithmetic number, because the mean of its divisors is an integer number (40546484077).

Almost surely, 2^81092968153 is an apocalyptic number.

It is an amenable number.

81092968153 is a deficient number, since it is larger than the sum of its proper divisors (1).

81092968153 is an equidigital number, since it uses as much as digits as its factorization.

81092968153 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 933120, while the sum is 52.

The spelling of 81092968153 in words is "eighty-one billion, ninety-two million, nine hundred sixty-eight thousand, one hundred fifty-three".