71821432900 has 36 divisors (see below), whose sum is σ = 178117155328. Its totient is φ = 24624491040.

The previous prime is 71821432841. The next prime is 71821432939. The reversal of 71821432900 is 923412817.

It is a self number, because there is not a number n which added to its sum of digits gives 71821432900.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51300324 + ... + 51301723.

Almost surely, 2^71821432900 is an apocalyptic number.

71821432900 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

71821432900 is an abundant number, since it is smaller than the sum of its proper divisors (106295722428).

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

71821432900 is a wasteful number, since it uses less digits than its factorization.

71821432900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102602068 (or 102602061 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The spelling of 71821432900 in words is "seventy-one billion, eight hundred twenty-one million, four hundred thirty-two thousand, nine hundred".