81128541403 has 8 divisors (see below), whose sum is σ = 99850512608. Its totient is φ = 64189615104.

The previous prime is 81128541391. The next prime is 81128541409. The reversal of 81128541403 is 30414582118.

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

It is a cyclic number.

It is not a de Polignac number, because 81128541403 - 2⁵ = 81128541371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81128541409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 445761126 + ... + 445761307.

It is an arithmetic number, because the mean of its divisors is an integer number (12481314076).

Almost surely, 2^81128541403 is an apocalyptic number.

81128541403 is a deficient number, since it is larger than the sum of its proper divisors (18721971205).

81128541403 is a wasteful number, since it uses less digits than its factorization.

81128541403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891522453.

The product of its (nonzero) digits is 30720, while the sum is 37.

The spelling of 81128541403 in words is "eighty-one billion, one hundred twenty-eight million, five hundred forty-one thousand, four hundred three".