81624852284 has 12 divisors (see below), whose sum is σ = 142866342864. Its totient is φ = 40805897184.

The previous prime is 81624852277. The next prime is 81624852299. The reversal of 81624852284 is 48225842618.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1604057 + ... + 1654160.

It is an arithmetic number, because the mean of its divisors is an integer number (11905528572).

Almost surely, 2^81624852284 is an apocalyptic number.

It is an amenable number.

81624852284 is a deficient number, since it is larger than the sum of its proper divisors (61241490580).

81624852284 is a wasteful number, since it uses less digits than its factorization.

81624852284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3264484 (or 3264482 counting only the distinct ones).

The product of its digits is 1966080, while the sum is 50.

The spelling of 81624852284 in words is "eighty-one billion, six hundred twenty-four million, eight hundred fifty-two thousand, two hundred eighty-four".