71238780722 has 18 divisors (see below), whose sum is σ = 108273249693. Its totient is φ = 35153790984.

The previous prime is 71238780713. The next prime is 71238780727. The reversal of 71238780722 is 22708783217.

It can be written as a sum of positive squares in 2 ways, for example, as 65475086161 + 5763694561 = 255881^2 + 75919^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=188731.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71238780727) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 29818304 + ... + 29820692.

Almost surely, 2^71238780722 is an apocalyptic number.

71238780722 is a deficient number, since it is larger than the sum of its proper divisors (37034468971).

71238780722 is an frugal number, since it uses more digits than its factorization.

71238780722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4938 (or 2470 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 47.

The spelling of 71238780722 in words is "seventy-one billion, two hundred thirty-eight million, seven hundred eighty thousand, seven hundred twenty-two".