71815015384 has 32 divisors (see below), whose sum is σ = 153992160000. Its totient is φ = 30757295520.

The previous prime is 71815015301. The next prime is 71815015403. The reversal of 71815015384 is 48351051817.

It is a self number, because there is not a number n which added to its sum of digits gives 71815015384.

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, 343812 + ... + 511699.

It is an arithmetic number, because the mean of its divisors is an integer number (4812255000).

Almost surely, 2^71815015384 is an apocalyptic number.

It is an amenable number.

71815015384 is an abundant number, since it is smaller than the sum of its proper divisors (82177144616).

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

71815015384 is a wasteful number, since it uses less digits than its factorization.

71815015384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857023 (or 857019 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 43.

The spelling of 71815015384 in words is "seventy-one billion, eight hundred fifteen million, fifteen thousand, three hundred eighty-four".