71044407440 has 80 divisors (see below), whose sum is σ = 177018455808. Its totient is φ = 26447528448.

The previous prime is 71044407407. The next prime is 71044407461. The reversal of 71044407440 is 4470444017.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 71044407440.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 453692 + ... + 589851.

Almost surely, 2^71044407440 is an apocalyptic number.

It is an amenable number.

71044407440 is an abundant number, since it is smaller than the sum of its proper divisors (105974048368).

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

71044407440 is a wasteful number, since it uses less digits than its factorization.

71044407440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043616 (or 1043610 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 35.

The spelling of 71044407440 in words is "seventy-one billion, forty-four million, four hundred seven thousand, four hundred forty".