71773220420 has 24 divisors (see below), whose sum is σ = 164425923648. Its totient is φ = 26099352800.

The previous prime is 71773220413. The next prime is 71773220429. The reversal of 71773220420 is 2402237717.

It is not an unprimeable number, because it can be changed into a prime (71773220429) 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, 163120736 + ... + 163121175.

It is an arithmetic number, because the mean of its divisors is an integer number (6851080152).

Almost surely, 2^71773220420 is an apocalyptic number.

It is an amenable number.

71773220420 is an abundant number, since it is smaller than the sum of its proper divisors (92652703228).

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

71773220420 is a wasteful number, since it uses less digits than its factorization.

71773220420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326241931 (or 326241929 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 35.

The spelling of 71773220420 in words is "seventy-one billion, seven hundred seventy-three million, two hundred twenty thousand, four hundred twenty".