71044007771 has 4 divisors (see below), whose sum is σ = 77502553944. Its totient is φ = 64585461600.

The previous prime is 71044007737. The next prime is 71044007789. The reversal of 71044007771 is 17770044017.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 71044007771 - 2⁶ = 71044007707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71044007791) 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 3 ways as a sum of consecutive naturals, for example, 3229273070 + ... + 3229273091.

It is an arithmetic number, because the mean of its divisors is an integer number (19375638486).

Almost surely, 2^71044007771 is an apocalyptic number.

71044007771 is a deficient number, since it is larger than the sum of its proper divisors (6458546173).

71044007771 is a wasteful number, since it uses less digits than its factorization.

71044007771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6458546172.

The product of its (nonzero) digits is 38416, while the sum is 38.

The spelling of 71044007771 in words is "seventy-one billion, forty-four million, seven thousand, seven hundred seventy-one".