71218692380 has 48 divisors (see below), whose sum is σ = 166949887104. Its totient is φ = 25295430720.

The previous prime is 71218692373. The next prime is 71218692383. The reversal of 71218692380 is 8329681217.

It is a happy number.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71218692383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3754742 + ... + 3773661.

It is an arithmetic number, because the mean of its divisors is an integer number (3478122648).

Almost surely, 2^71218692380 is an apocalyptic number.

It is an amenable number.

71218692380 is an abundant number, since it is smaller than the sum of its proper divisors (95731194724).

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

71218692380 is a wasteful number, since it uses less digits than its factorization.

71218692380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7528466 (or 7528464 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 47.

The spelling of 71218692380 in words is "seventy-one billion, two hundred eighteen million, six hundred ninety-two thousand, three hundred eighty".