26661215000 has 160 divisors (see below), whose sum is σ = 72606758400. Its totient is φ = 8985360000.

The previous prime is 26661214999. The next prime is 26661215069. The reversal of 26661215000 is 51216662.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2058545 + ... + 2071455.

It is an arithmetic number, because the mean of its divisors is an integer number (453792240).

Almost surely, 2^26661215000 is an apocalyptic number.

26661215000 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 26661215000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36303379200).

26661215000 is an abundant number, since it is smaller than the sum of its proper divisors (45945543400).

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

26661215000 is a wasteful number, since it uses less digits than its factorization.

26661215000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13003 (or 12984 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 26661215000 in words is "twenty-six billion, six hundred sixty-one million, two hundred fifteen thousand".