81475033484 has 48 divisors (see below), whose sum is σ = 158644008768. Its totient is φ = 36368310528.

The previous prime is 81475033481. The next prime is 81475033513. The reversal of 81475033484 is 48433057418.

It is not an unprimeable number, because it can be changed into a prime (81475033481) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 194522 + ... + 448094.

It is an arithmetic number, because the mean of its divisors is an integer number (3305083516).

Almost surely, 2^81475033484 is an apocalyptic number.

It is an amenable number.

81475033484 is a deficient number, since it is larger than the sum of its proper divisors (77168975284).

81475033484 is a wasteful number, since it uses less digits than its factorization.

81475033484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253794 (or 253792 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 47.

The spelling of 81475033484 in words is "eighty-one billion, four hundred seventy-five million, thirty-three thousand, four hundred eighty-four".