81450483800 has 96 divisors (see below), whose sum is σ = 216484641120. Its totient is φ = 27918259200.

The previous prime is 81450483761. The next prime is 81450483833. The reversal of 81450483800 is 838405418.

It is a super-2 number, since 2×81450483800² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8026730 + ... + 8036870.

It is an arithmetic number, because the mean of its divisors is an integer number (2255048345).

Almost surely, 2^81450483800 is an apocalyptic number.

It is an amenable number.

81450483800 is an abundant number, since it is smaller than the sum of its proper divisors (135034157320).

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

81450483800 is a wasteful number, since it uses less digits than its factorization.

81450483800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15901 (or 15892 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 41.

The spelling of 81450483800 in words is "eighty-one billion, four hundred fifty million, four hundred eighty-three thousand, eight hundred".