81484534087 has 4 divisors (see below), whose sum is σ = 88892219016. Its totient is φ = 74076849160.

The previous prime is 81484534073. The next prime is 81484534099. The reversal of 81484534087 is 78043548418.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 81484534087 - 2³¹ = 79337050439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81484534037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3703842448 + ... + 3703842469.

It is an arithmetic number, because the mean of its divisors is an integer number (22223054754).

Almost surely, 2^81484534087 is an apocalyptic number.

81484534087 is a deficient number, since it is larger than the sum of its proper divisors (7407684929).

81484534087 is a wasteful number, since it uses less digits than its factorization.

81484534087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7407684928.

The product of its (nonzero) digits is 3440640, while the sum is 52.

The spelling of 81484534087 in words is "eighty-one billion, four hundred eighty-four million, five hundred thirty-four thousand, eighty-seven".