71636721870264 has 32 divisors (see below), whose sum is σ = 179175610047120. Its totient is φ = 23867733240576.

The previous prime is 71636721870251. The next prime is 71636721870313. The reversal of 71636721870264 is 46207812763617.

It is a junction number, because it is equal to n+sod(n) for n = 71636721870198 and 71636721870207.

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, 698325739 + ... + 698428314.

Almost surely, 2^{71636721870264} is an apocalyptic number.

It is an amenable number.

71636721870264 is an abundant number, since it is smaller than the sum of its proper divisors (107538888176856).

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

71636721870264 is a wasteful number, since it uses less digits than its factorization.

71636721870264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396756199 (or 1396756195 counting only the distinct ones).

The product of its (nonzero) digits is 28449792, while the sum is 60.

The spelling of 71636721870264 in words is "seventy-one trillion, six hundred thirty-six billion, seven hundred twenty-one million, eight hundred seventy thousand, two hundred sixty-four".