81292208603 has 16 divisors (see below), whose sum is σ = 86569119360. Its totient is φ = 76190083200.

The previous prime is 81292208551. The next prime is 81292208609. The reversal of 81292208603 is 30680229218.

It is a cyclic number.

It is not a de Polignac number, because 81292208603 - 2⁶ = 81292208539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81292208609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 374573 + ... + 550353.

It is an arithmetic number, because the mean of its divisors is an integer number (5410569960).

Almost surely, 2^81292208603 is an apocalyptic number.

81292208603 is a deficient number, since it is larger than the sum of its proper divisors (5276910757).

81292208603 is a wasteful number, since it uses less digits than its factorization.

81292208603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176278.

The product of its (nonzero) digits is 82944, while the sum is 41.

The spelling of 81292208603 in words is "eighty-one billion, two hundred ninety-two million, two hundred eight thousand, six hundred three".