71155256784 has 40 divisors (see below), whose sum is σ = 189747355392. Its totient is φ = 22953308160.

The previous prime is 71155256771. The next prime is 71155256803. The reversal of 71155256784 is 48765255117.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23908209 + ... + 23911184.

Almost surely, 2^71155256784 is an apocalyptic number.

It is an amenable number.

71155256784 is an abundant number, since it is smaller than the sum of its proper divisors (118592098608).

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

71155256784 is a wasteful number, since it uses less digits than its factorization.

71155256784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47819435 (or 47819429 counting only the distinct ones).

The product of its digits is 2352000, while the sum is 51.

The spelling of 71155256784 in words is "seventy-one billion, one hundred fifty-five million, two hundred fifty-six thousand, seven hundred eighty-four".