81526209096973 has 8 divisors (see below), whose sum is σ = 86010780189600. Its totient is φ = 77061009802608.

The previous prime is 81526209096967. The next prime is 81526209097007. The reversal of 81526209096973 is 37969090262518.

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 81526209096973 - 2²¹ = 81526206999821 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81526209096899 and 81526209096908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81526209090973) 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, 4842940918 + ... + 4842957751.

It is an arithmetic number, because the mean of its divisors is an integer number (10751347523700).

Almost surely, 2^{81526209096973} is an apocalyptic number.

It is an amenable number.

81526209096973 is a deficient number, since it is larger than the sum of its proper divisors (4484571092627).

81526209096973 is a wasteful number, since it uses less digits than its factorization.

81526209096973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9685899131.

The product of its (nonzero) digits is 88179840, while the sum is 67.

The spelling of 81526209096973 in words is "eighty-one trillion, five hundred twenty-six billion, two hundred nine million, ninety-six thousand, nine hundred seventy-three".