71241440881 has 16 divisors (see below), whose sum is σ = 81583289424. Its totient is φ = 61627336704.

The previous prime is 71241440869. The next prime is 71241440903. The reversal of 71241440881 is 18804414217.

It can be written as a sum of positive squares in 8 ways, for example, as 13489661025 + 57751779856 = 116145^2 + 240316^2 .

It is a cyclic number.

It is not a de Polignac number, because 71241440881 - 2¹⁷ = 71241309809 is a prime.

It is a super-2 number, since 2×71241440881² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71241440801) 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, 640266 + ... + 743251.

It is an arithmetic number, because the mean of its divisors is an integer number (5098955589).

Almost surely, 2^71241440881 is an apocalyptic number.

It is an amenable number.

71241440881 is a deficient number, since it is larger than the sum of its proper divisors (10341848543).

71241440881 is a wasteful number, since it uses less digits than its factorization.

71241440881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1383780.

The product of its (nonzero) digits is 57344, while the sum is 40.

The spelling of 71241440881 in words is "seventy-one billion, two hundred forty-one million, four hundred forty thousand, eight hundred eighty-one".