71622540020 has 48 divisors (see below), whose sum is σ = 154241203536. Its totient is φ = 27920256000.

The previous prime is 71622540001. The next prime is 71622540029. The reversal of 71622540020 is 2004522617.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4435826404 + 67186713616 = 66602^2 + 259204^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71622540029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 725210 + ... + 818030.

It is an arithmetic number, because the mean of its divisors is an integer number (3213358407).

Almost surely, 2^71622540020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71622540020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77120601768).

71622540020 is an abundant number, since it is smaller than the sum of its proper divisors (82618663516).

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

71622540020 is a wasteful number, since it uses less digits than its factorization.

71622540020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93812 (or 93810 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The spelling of 71622540020 in words is "seventy-one billion, six hundred twenty-two million, five hundred forty thousand, twenty".