81452606 has 16 divisors (see below), whose sum is σ = 123967584. Its totient is φ = 40134144.

The previous prime is 81452537. The next prime is 81452611. The reversal of 81452606 is 60625418.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47150 + ... + 48846.

It is an arithmetic number, because the mean of its divisors is an integer number (7747974).

Almost surely, 2^81452606 is an apocalyptic number.

81452606 is a deficient number, since it is larger than the sum of its proper divisors (42514978).

81452606 is a wasteful number, since it uses less digits than its factorization.

81452606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2035.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 81452606 is about 9025.1097500252. The cubic root of 81452606 is about 433.4792645910.

It can be divided in two parts, 8145 and 2606, that multiplied together give a triangular number (21225870 = T₆₅₁₅).

The spelling of 81452606 in words is "eighty-one million, four hundred fifty-two thousand, six hundred six".