81470860054 has 4 divisors (see below), whose sum is σ = 122206290084. Its totient is φ = 40735430026.

The previous prime is 81470860039. The next prime is 81470860063. The reversal of 81470860054 is 45006807418.

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

It is a congruent 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 as a sum of consecutive naturals, namely, 20367715012 + ... + 20367715015.

It is an arithmetic number, because the mean of its divisors is an integer number (30551572521).

Almost surely, 2^81470860054 is an apocalyptic number.

81470860054 is a deficient number, since it is larger than the sum of its proper divisors (40735430030).

81470860054 is a wasteful number, since it uses less digits than its factorization.

81470860054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40735430029.

The product of its (nonzero) digits is 215040, while the sum is 43.

The spelling of 81470860054 in words is "eighty-one billion, four hundred seventy million, eight hundred sixty thousand, fifty-four".