71045878840 has 32 divisors (see below), whose sum is σ = 162869330880. Its totient is φ = 27882155392.

The previous prime is 71045878807. The next prime is 71045878847. The reversal of 71045878840 is 4887854017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71045878847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16753984 + ... + 16758223.

It is an arithmetic number, because the mean of its divisors is an integer number (5089666590).

Almost surely, 2^71045878840 is an apocalyptic number.

It is an amenable number.

71045878840 is an abundant number, since it is smaller than the sum of its proper divisors (91823452040).

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

71045878840 is a wasteful number, since it uses less digits than its factorization.

71045878840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33512271 (or 33512267 counting only the distinct ones).

The product of its (nonzero) digits is 2007040, while the sum is 52.

The spelling of 71045878840 in words is "seventy-one billion, forty-five million, eight hundred seventy-eight thousand, eight hundred forty".