26404245504 has 624 divisors, whose sum is σ = 99606753792. Its totient is φ = 6539968512.

The previous prime is 26404245499. The next prime is 26404245523. The reversal of 26404245504 is 40554240462.

26404245504 is a `hidden beast` number, since 2 + 6 + 404 + 245 + 5 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (624).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 57028377 + ... + 57028839.

It is an arithmetic number, because the mean of its divisors is an integer number (159626208).

Almost surely, 2^26404245504 is an apocalyptic number.

26404245504 is a gapful number since it is divisible by the number (24) 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 26404245504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49803376896).

26404245504 is an abundant number, since it is smaller than the sum of its proper divisors (73202508288).

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

26404245504 is a wasteful number, since it uses less digits than its factorization.

26404245504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530 (or 505 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 36.

Adding to 26404245504 its reverse (40554240462), we get a palindrome (66958485966).

The spelling of 26404245504 in words is "twenty-six billion, four hundred four million, two hundred forty-five thousand, five hundred four".