71398982780 has 24 divisors (see below), whose sum is σ = 153424792752. Its totient is φ = 27895416192.

The previous prime is 71398982749. The next prime is 71398982803. The reversal of 71398982780 is 8728989317.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41510177 + ... + 41511896.

It is an arithmetic number, because the mean of its divisors is an integer number (6392699698).

Almost surely, 2^71398982780 is an apocalyptic number.

It is an amenable number.

71398982780 is an abundant number, since it is smaller than the sum of its proper divisors (82025809972).

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

71398982780 is a wasteful number, since it uses less digits than its factorization.

71398982780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83022125 (or 83022123 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 62.

The spelling of 71398982780 in words is "seventy-one billion, three hundred ninety-eight million, nine hundred eighty-two thousand, seven hundred eighty".