81453546524 has 18 divisors (see below), whose sum is σ = 165816148680. Its totient is φ = 34908662712.

The previous prime is 81453546523. The next prime is 81453546527. The reversal of 81453546524 is 42564535418.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81453546521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 207789464 + ... + 207789855.

It is an arithmetic number, because the mean of its divisors is an integer number (9212008260).

Almost surely, 2^81453546524 is an apocalyptic number.

It is an amenable number.

81453546524 is an abundant number, since it is smaller than the sum of its proper divisors (84362602156).

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

81453546524 is a wasteful number, since it uses less digits than its factorization.

81453546524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415579337 (or 415579328 counting only the distinct ones).

The product of its digits is 2304000, while the sum is 47.

The spelling of 81453546524 in words is "eighty-one billion, four hundred fifty-three million, five hundred forty-six thousand, five hundred twenty-four".