81862349500 has 24 divisors (see below), whose sum is σ = 178787372400. Its totient is φ = 32744939600.

The previous prime is 81862349479. The next prime is 81862349519. The reversal of 81862349500 is 594326818.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 81861850 + ... + 81862849.

It is an arithmetic number, because the mean of its divisors is an integer number (7449473850).

Almost surely, 2^81862349500 is an apocalyptic number.

It is an amenable number.

81862349500 is an abundant number, since it is smaller than the sum of its proper divisors (96925022900).

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

81862349500 is a wasteful number, since it uses less digits than its factorization.

81862349500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163724718 (or 163724706 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 46.

The spelling of 81862349500 in words is "eighty-one billion, eight hundred sixty-two million, three hundred forty-nine thousand, five hundred".