71071444771 has 16 divisors (see below), whose sum is σ = 73706944608. Its totient is φ = 68485536000.

The previous prime is 71071444747. The next prime is 71071444777. The reversal of 71071444771 is 17744417017.

It is a cyclic number.

It is not a de Polignac number, because 71071444771 - 2²¹ = 71069347619 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71071444777) 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, 1191265 + ... + 1249501.

It is an arithmetic number, because the mean of its divisors is an integer number (4606684038).

Almost surely, 2^71071444771 is an apocalyptic number.

71071444771 is a deficient number, since it is larger than the sum of its proper divisors (2635499837).

71071444771 is a wasteful number, since it uses less digits than its factorization.

71071444771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58662.

The product of its (nonzero) digits is 153664, while the sum is 43.

The spelling of 71071444771 in words is "seventy-one billion, seventy-one million, four hundred forty-four thousand, seven hundred seventy-one".