26104200640 has 112 divisors (see below), whose sum is σ = 71111132352. Its totient is φ = 8941142016.

The previous prime is 26104200631. The next prime is 26104200641. The reversal of 26104200640 is 4600240162.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26104200641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2496864 + ... + 2507296.

Almost surely, 2^26104200640 is an apocalyptic number.

26104200640 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 26104200640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35555566176).

26104200640 is an abundant number, since it is smaller than the sum of its proper divisors (45006931712).

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

26104200640 is a wasteful number, since it uses less digits than its factorization.

26104200640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11574 (or 11564 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The spelling of 26104200640 in words is "twenty-six billion, one hundred four million, two hundred thousand, six hundred forty".