10861017720872 has 24 divisors (see below), whose sum is σ = 22384018961850. Its totient is φ = 4936826236320.

The previous prime is 10861017720859. The next prime is 10861017720893. The reversal of 10861017720872 is 27802771016801.

It can be written as a sum of positive squares in only one way, i.e., 9820915539556 + 1040102181316 = 3133834^2 + 1019854^2 .

It is a super-2 number, since 2×10861017720872² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10861017720872.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5610028847 + ... + 5610030782.

Almost surely, 2^{10861017720872} is an apocalyptic number.

It is an amenable number.

10861017720872 is an abundant number, since it is smaller than the sum of its proper divisors (11523001240978).

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

10861017720872 is a wasteful number, since it uses less digits than its factorization.

10861017720872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11220059657 (or 11220059642 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 50.

The spelling of 10861017720872 in words is "ten trillion, eight hundred sixty-one billion, seventeen million, seven hundred twenty thousand, eight hundred seventy-two".