26757693440 has 72 divisors (see below), whose sum is σ = 64219792140. Its totient is φ = 10702815232.

The previous prime is 26757693437. The next prime is 26757693461. The reversal of 26757693440 is 4439675762.

It can be written as a sum of positive squares in 2 ways, for example, as 24465965056 + 2291728384 = 156416^2 + 47872^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 634946 + ... + 675774.

Almost surely, 2^26757693440 is an apocalyptic number.

26757693440 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 26757693440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32109896070).

26757693440 is an abundant number, since it is smaller than the sum of its proper divisors (37462098700).

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

26757693440 is an frugal number, since it uses more digits than its factorization.

26757693440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40868 (or 40836 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 53.

The spelling of 26757693440 in words is "twenty-six billion, seven hundred fifty-seven million, six hundred ninety-three thousand, four hundred forty".