2865887172720 has 800 divisors, whose sum is σ = 11711853768384. Its totient is φ = 640327680000.

The previous prime is 2865887172697. The next prime is 2865887172763. The reversal of 2865887172720 is 272717885682.

2865887172720 is a `hidden beast` number, since 2 + 8 + 6 + 588 + 7 + 1 + 7 + 27 + 20 = 666.

It is a super-2 number, since 2×2865887172720² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 716290720 + ... + 716294720.

Almost surely, 2^{2865887172720} is an apocalyptic number.

2865887172720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2865887172720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5855926884192).

2865887172720 is an abundant number, since it is smaller than the sum of its proper divisors (8845966595664).

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

2865887172720 is a wasteful number, since it uses less digits than its factorization.

2865887172720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4823 (or 4808 counting only the distinct ones).

The product of its (nonzero) digits is 42147840, while the sum is 63.

The spelling of 2865887172720 in words is "two trillion, eight hundred sixty-five billion, eight hundred eighty-seven million, one hundred seventy-two thousand, seven hundred twenty".