26861032512 has 224 divisors, whose sum is σ = 83788300800. Its totient is φ = 8409194496.

The previous prime is 26861032501. The next prime is 26861032553. The reversal of 26861032512 is 21523016862.

26861032512 is a `hidden beast` number, since 2 + 6 + 8 + 610 + 3 + 25 + 12 = 666.

It is a super-2 number, since 2×26861032512² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24352153 + ... + 24353255.

Almost surely, 2^26861032512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26861032512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41894150400).

26861032512 is an abundant number, since it is smaller than the sum of its proper divisors (56927268288).

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

26861032512 is a wasteful number, since it uses less digits than its factorization.

26861032512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1970 (or 1954 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 26861032512 in words is "twenty-six billion, eight hundred sixty-one million, thirty-two thousand, five hundred twelve".