81105078003 has 8 divisors (see below), whose sum is σ = 109508966400. Its totient is φ = 53385620808.

The previous prime is 81105077993. The next prime is 81105078029. The reversal of 81105078003 is 30087050118.

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

It is not a de Polignac number, because 81105078003 - 2¹⁶ = 81105012467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81105078083) 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, 171107523 + ... + 171107996.

It is an arithmetic number, because the mean of its divisors is an integer number (13688620800).

Almost surely, 2^81105078003 is an apocalyptic number.

81105078003 is a deficient number, since it is larger than the sum of its proper divisors (28403888397).

81105078003 is a wasteful number, since it uses less digits than its factorization.

81105078003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342215601.

The product of its (nonzero) digits is 6720, while the sum is 33.

The spelling of 81105078003 in words is "eighty-one billion, one hundred five million, seventy-eight thousand, three".