71821709330 has 48 divisors (see below), whose sum is σ = 153883255680. Its totient is φ = 24051914208.

The previous prime is 71821709291. The next prime is 71821709339. The reversal of 71821709330 is 3390712817.

It is not an unprimeable number, because it can be changed into a prime (71821709339) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1683290 + ... + 1725429.

It is an arithmetic number, because the mean of its divisors is an integer number (3205901160).

Almost surely, 2^71821709330 is an apocalyptic number.

71821709330 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

71821709330 is an abundant number, since it is smaller than the sum of its proper divisors (82061546350).

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

71821709330 is a wasteful number, since it uses less digits than its factorization.

71821709330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3408783 (or 3408776 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 41.

The spelling of 71821709330 in words is "seventy-one billion, eight hundred twenty-one million, seven hundred nine thousand, three hundred thirty".