81012453 has 8 divisors (see below), whose sum is σ = 109787616. Its totient is φ = 53122800.

The previous prime is 81012439. The next prime is 81012479. The reversal of 81012453 is 35421018.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81012453 - 2¹⁰ = 81011429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81012413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221163 + ... + 221528.

It is an arithmetic number, because the mean of its divisors is an integer number (13723452).

Almost surely, 2^81012453 is an apocalyptic number.

It is an amenable number.

81012453 is a deficient number, since it is larger than the sum of its proper divisors (28775163).

81012453 is a wasteful number, since it uses less digits than its factorization.

81012453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442755.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 81012453 is about 9000.6918067446. The cubic root of 81012453 is about 432.6970432077.

The spelling of 81012453 in words is "eighty-one million, twelve thousand, four hundred fifty-three".