26378887500 has 864 divisors, whose sum is σ = 105098273280. Its totient is φ = 5443200000.

The previous prime is 26378887499. The next prime is 26378887501. The reversal of 26378887500 is 578887362.

26378887500 is a `hidden beast` number, since 2 + 63 + 78 + 8 + 8 + 7 + 500 = 666.

It is an interprime number because it is at equal distance from previous prime (26378887499) and next prime (26378887501).

It is not an unprimeable number, because it can be changed into a prime (26378887501) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 613462479 + ... + 613462521.

It is an arithmetic number, because the mean of its divisors is an integer number (121641520).

Almost surely, 2^26378887500 is an apocalyptic number.

26378887500 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 26378887500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52549136640).

26378887500 is an abundant number, since it is smaller than the sum of its proper divisors (78719385780).

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

26378887500 is a wasteful number, since it uses less digits than its factorization.

26378887500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 54.

The spelling of 26378887500 in words is "twenty-six billion, three hundred seventy-eight million, eight hundred eighty-seven thousand, five hundred".