71909747900 has 36 divisors (see below), whose sum is σ = 160261570728. Its totient is φ = 27986495040.

The previous prime is 71909747869. The next prime is 71909747911. The reversal of 71909747900 is 974790917.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9713834 + ... + 9721233.

It is an arithmetic number, because the mean of its divisors is an integer number (4451710298).

Almost surely, 2^71909747900 is an apocalyptic number.

It is an amenable number.

71909747900 is an abundant number, since it is smaller than the sum of its proper divisors (88351822828).

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

71909747900 is a wasteful number, since it uses less digits than its factorization.

71909747900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19435118 (or 19435111 counting only the distinct ones).

The product of its (nonzero) digits is 1000188, while the sum is 53.

The spelling of 71909747900 in words is "seventy-one billion, nine hundred nine million, seven hundred forty-seven thousand, nine hundred".