71720212290 has 16 divisors (see below), whose sum is σ = 172128509568. Its totient is φ = 19125389936.

The previous prime is 71720212279. The next prime is 71720212297. The reversal of 71720212290 is 9221202717.

It is not an unprimeable number, because it can be changed into a prime (71720212297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1195336842 + ... + 1195336901.

It is an arithmetic number, because the mean of its divisors is an integer number (10758031848).

Almost surely, 2^71720212290 is an apocalyptic number.

71720212290 is an abundant number, since it is smaller than the sum of its proper divisors (100408297278).

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

71720212290 is a wasteful number, since it uses less digits than its factorization.

71720212290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2390673753.

The product of its (nonzero) digits is 7056, while the sum is 33.

The spelling of 71720212290 in words is "seventy-one billion, seven hundred twenty million, two hundred twelve thousand, two hundred ninety".