81089507426 has 8 divisors (see below), whose sum is σ = 122025369024. Its totient is φ = 40414384420.

The previous prime is 81089507393. The next prime is 81089507449. The reversal of 81089507426 is 62470598018.

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

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65183870 + ... + 65185113.

It is an arithmetic number, because the mean of its divisors is an integer number (15253171128).

Almost surely, 2^81089507426 is an apocalyptic number.

81089507426 is a deficient number, since it is larger than the sum of its proper divisors (40935861598).

81089507426 is a wasteful number, since it uses less digits than its factorization.

81089507426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130369296.

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 81089507426 in words is "eighty-one billion, eighty-nine million, five hundred seven thousand, four hundred twenty-six".