26957641728 has 96 divisors (see below), whose sum is σ = 71986758480. Its totient is φ = 8971223040.

The previous prime is 26957641723. The next prime is 26957641729. The reversal of 26957641728 is 82714675962.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26957641723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4156248 + ... + 4162728.

Almost surely, 2^26957641728 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 26957641728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35993379240).

26957641728 is an abundant number, since it is smaller than the sum of its proper divisors (45029116752).

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

26957641728 is an equidigital number, since it uses as much as digits as its factorization.

26957641728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7183 (or 7163 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 57.

The spelling of 26957641728 in words is "twenty-six billion, nine hundred fifty-seven million, six hundred forty-one thousand, seven hundred twenty-eight".