26250561500 has 96 divisors (see below), whose sum is σ = 60446131200. Its totient is φ = 9931521600.

The previous prime is 26250561433. The next prime is 26250561511. The reversal of 26250561500 is 516505262.

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, 7056641 + ... + 7060359.

It is an arithmetic number, because the mean of its divisors is an integer number (629647200).

Almost surely, 2^26250561500 is an apocalyptic number.

26250561500 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 26250561500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30223065600).

26250561500 is an abundant number, since it is smaller than the sum of its proper divisors (34195569700).

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

26250561500 is a wasteful number, since it uses less digits than its factorization.

26250561500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4500 (or 4488 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 26250561500 in words is "twenty-six billion, two hundred fifty million, five hundred sixty-one thousand, five hundred".