71732857215 has 16 divisors (see below), whose sum is σ = 114803178336. Its totient is φ = 38247321600.

The previous prime is 71732857213. The next prime is 71732857271. The reversal of 71732857215 is 51275823717.

It is a happy number.

It is not a de Polignac number, because 71732857215 - 2¹ = 71732857213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71732857213) 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, 579346 + ... + 692175.

It is an arithmetic number, because the mean of its divisors is an integer number (7175198646).

Almost surely, 2^71732857215 is an apocalyptic number.

71732857215 is a deficient number, since it is larger than the sum of its proper divisors (43070321121).

71732857215 is a wasteful number, since it uses less digits than its factorization.

71732857215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275290.

The product of its digits is 823200, while the sum is 48.

The spelling of 71732857215 in words is "seventy-one billion, seven hundred thirty-two million, eight hundred fifty-seven thousand, two hundred fifteen".