26158499840 has 288 divisors, whose sum is σ = 71740468800. Its totient is φ = 9077882880.

The previous prime is 26158499839. The next prime is 26158499849. The reversal of 26158499840 is 4899485162.

It is a super-2 number, since 2×26158499840² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26158499849) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 59586341 + ... + 59586779.

It is an arithmetic number, because the mean of its divisors is an integer number (249098850).

Almost surely, 2^26158499840 is an apocalyptic number.

26158499840 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 26158499840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35870234400).

26158499840 is an abundant number, since it is smaller than the sum of its proper divisors (45581968960).

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

26158499840 is a wasteful number, since it uses less digits than its factorization.

26158499840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523 (or 480 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 56.

The spelling of 26158499840 in words is "twenty-six billion, one hundred fifty-eight million, four hundred ninety-nine thousand, eight hundred forty".