26538731000 has 128 divisors (see below), whose sum is σ = 64865361600. Its totient is φ = 10152691200.

The previous prime is 26538730951. The next prime is 26538731027. The reversal of 26538731000 is 13783562.

It is a super-4 number, since 4×26538731000⁴ (a number of 43 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2176922 + ... + 2189078.

Almost surely, 2^26538731000 is an apocalyptic number.

26538731000 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 26538731000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32432680800).

26538731000 is an abundant number, since it is smaller than the sum of its proper divisors (38326630600).

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

26538731000 is a wasteful number, since it uses less digits than its factorization.

26538731000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12274 (or 12260 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The spelling of 26538731000 in words is "twenty-six billion, five hundred thirty-eight million, seven hundred thirty-one thousand".