26891731552 has 72 divisors (see below), whose sum is σ = 63710660160. Its totient is φ = 11127594240.

The previous prime is 26891731549. The next prime is 26891731553. The reversal of 26891731552 is 25513719862.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a junction number, because it is equal to n+sod(n) for n = 26891731496 and 26891731505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26891731553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 250224 + ... + 341167.

It is an arithmetic number, because the mean of its divisors is an integer number (884870280).

Almost surely, 2^26891731552 is an apocalyptic number.

It is an amenable number.

26891731552 is an abundant number, since it is smaller than the sum of its proper divisors (36818928608).

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

26891731552 is a wasteful number, since it uses less digits than its factorization.

26891731552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591444 (or 591429 counting only the distinct ones).

The product of its digits is 907200, while the sum is 49.

The spelling of 26891731552 in words is "twenty-six billion, eight hundred ninety-one million, seven hundred thirty-one thousand, five hundred fifty-two".