26581118464 has 60 divisors (see below), whose sum is σ = 54291984912. Its totient is φ = 12995404800.

The previous prime is 26581118419. The next prime is 26581118467. The reversal of 26581118464 is 46481118562.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26581118467) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25290739 + ... + 25291789.

Almost surely, 2^26581118464 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 26581118464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27145992456).

26581118464 is an abundant number, since it is smaller than the sum of its proper divisors (27710866448).

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

26581118464 is an frugal number, since it uses more digits than its factorization.

26581118464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2167 (or 1100 counting only the distinct ones).

The product of its digits is 368640, while the sum is 46.

The spelling of 26581118464 in words is "twenty-six billion, five hundred eighty-one million, one hundred eighteen thousand, four hundred sixty-four".