81484551054 has 24 divisors (see below), whose sum is σ = 176562988992. Its totient is φ = 27159497280.

The previous prime is 81484551019. The next prime is 81484551097. The reversal of 81484551054 is 45015548418.

81484551054 is a `hidden beast` number, since 8 + 1 + 4 + 84 + 5 + 510 + 54 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91299 + ... + 413889.

It is an arithmetic number, because the mean of its divisors is an integer number (7356791208).

Almost surely, 2^81484551054 is an apocalyptic number.

81484551054 is an abundant number, since it is smaller than the sum of its proper divisors (95078437938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81484551054 is a wasteful number, since it uses less digits than its factorization.

81484551054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336632 (or 336629 counting only the distinct ones).

The product of its (nonzero) digits is 512000, while the sum is 45.

The spelling of 81484551054 in words is "eighty-one billion, four hundred eighty-four million, five hundred fifty-one thousand, fifty-four".