8720538357887 has 8 divisors (see below), whose sum is σ = 8722528306800. Its totient is φ = 8718548612544.

The previous prime is 8720538357829. The next prime is 8720538357919. The reversal of 8720538357887 is 7887538350278.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8720538357887 - 2¹⁴ = 8720538341503 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8720538357887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8720538357827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112358108 + ... + 112435694.

It is an arithmetic number, because the mean of its divisors is an integer number (1090316038350).

Almost surely, 2^{8720538357887} is an apocalyptic number.

8720538357887 is a deficient number, since it is larger than the sum of its proper divisors (1989948913).

8720538357887 is a wasteful number, since it uses less digits than its factorization.

8720538357887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101785.

The product of its (nonzero) digits is 632217600, while the sum is 71.

The spelling of 8720538357887 in words is "eight trillion, seven hundred twenty billion, five hundred thirty-eight million, three hundred fifty-seven thousand, eight hundred eighty-seven".