81452611 has 2 divisors, whose sum is σ = 81452612. Its totient is φ = 81452610.

The previous prime is 81452537. The next prime is 81452617. The reversal of 81452611 is 11625418.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81452611 - 2¹¹ = 81450563 is a prime.

It is equal to p_4749400 and since 81452611 and 4749400 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81452611.

It is not a weakly prime, because it can be changed into another prime (81452617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40726305 + 40726306.

It is an arithmetic number, because the mean of its divisors is an integer number (40726306).

Almost surely, 2^81452611 is an apocalyptic number.

81452611 is a deficient number, since it is larger than the sum of its proper divisors (1).

81452611 is an equidigital number, since it uses as much as digits as its factorization.

81452611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 28.

The square root of 81452611 is about 9025.1100270301. The cubic root of 81452611 is about 433.4792734607.

The spelling of 81452611 in words is "eighty-one million, four hundred fifty-two thousand, six hundred eleven".