26499955678980 has 288 divisors, whose sum is σ = 92136680616960. Its totient is φ = 5657513783040.

The previous prime is 26499955678957. The next prime is 26499955679027. The reversal of 26499955678980 is 8987655999462.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 625219 + ... + 7306901.

It is an arithmetic number, because the mean of its divisors is an integer number (319919029920).

Almost surely, 2^{26499955678980} is an apocalyptic number.

26499955678980 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 26499955678980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46068340308480).

26499955678980 is an abundant number, since it is smaller than the sum of its proper divisors (65636724937980).

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

26499955678980 is a wasteful number, since it uses less digits than its factorization.

26499955678980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6681799 (or 6681790 counting only the distinct ones).

The product of its (nonzero) digits is 21163161600, while the sum is 87.

The spelling of 26499955678980 in words is "twenty-six trillion, four hundred ninety-nine billion, nine hundred fifty-five million, six hundred seventy-eight thousand, nine hundred eighty".