81504322398011 has 8 divisors (see below), whose sum is σ = 81918784119744. Its totient is φ = 81089868092800.

The previous prime is 81504322397923. The next prime is 81504322398047. The reversal of 81504322398011 is 11089322340518.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81504322398011 is a prime.

It is a super-2 number, since 2×81504322398011² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81504322398211) 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, 20888291 + ... + 24481203.

It is an arithmetic number, because the mean of its divisors is an integer number (10239848014968).

Almost surely, 2^{81504322398011} is an apocalyptic number.

81504322398011 is a deficient number, since it is larger than the sum of its proper divisors (414461721733).

81504322398011 is a wasteful number, since it uses less digits than its factorization.

81504322398011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3708261.

The product of its (nonzero) digits is 414720, while the sum is 47.

The spelling of 81504322398011 in words is "eighty-one trillion, five hundred four billion, three hundred twenty-two million, three hundred ninety-eight thousand, eleven".