81043501451 has 16 divisors (see below), whose sum is σ = 89886517728. Its totient is φ = 72447091200.

The previous prime is 81043501403. The next prime is 81043501459. The reversal of 81043501451 is 15410534018.

It is not a de Polignac number, because 81043501451 - 2⁶ = 81043501387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81043501459) 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 in 15 ways as a sum of consecutive naturals, for example, 2585891 + ... + 2617043.

It is an arithmetic number, because the mean of its divisors is an integer number (5617907358).

Almost surely, 2^81043501451 is an apocalyptic number.

81043501451 is a deficient number, since it is larger than the sum of its proper divisors (8843016277).

81043501451 is a wasteful number, since it uses less digits than its factorization.

81043501451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35102.

The product of its (nonzero) digits is 9600, while the sum is 32.

The spelling of 81043501451 in words is "eighty-one billion, forty-three million, five hundred one thousand, four hundred fifty-one".