81482054289 has 8 divisors (see below), whose sum is σ = 115033488480. Its totient is φ = 51125994816.

The previous prime is 81482054273. The next prime is 81482054293. The reversal of 81482054289 is 98245028418.

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

It is not a de Polignac number, because 81482054289 - 2⁴ = 81482054273 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51), and also a Moran number because the ratio is a prime number: 1597687339 = 81482054289 / (8 + 1 + 4 + 8 + 2 + 0 + 5 + 4 + 2 + 8 + 9).

It is not an unprimeable number, because it can be changed into a prime (81482054219) 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, 798843619 + ... + 798843720.

It is an arithmetic number, because the mean of its divisors is an integer number (14379186060).

Almost surely, 2^81482054289 is an apocalyptic number.

It is an amenable number.

81482054289 is a deficient number, since it is larger than the sum of its proper divisors (33551434191).

81482054289 is a wasteful number, since it uses less digits than its factorization.

81482054289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1597687359.

The product of its (nonzero) digits is 1474560, while the sum is 51.

The spelling of 81482054289 in words is "eighty-one billion, four hundred eighty-two million, fifty-four thousand, two hundred eighty-nine".