26396491000 has 256 divisors, whose sum is σ = 72298137600. Its totient is φ = 8918208000.

The previous prime is 26396490929. The next prime is 26396491001. The reversal of 26396491000 is 19469362.

It is a super-2 number, since 2×26396491000² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26396491001) 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 63 ways as a sum of consecutive naturals, for example, 11075809 + ... + 11078191.

It is an arithmetic number, because the mean of its divisors is an integer number (282414600).

Almost surely, 2^26396491000 is an apocalyptic number.

26396491000 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 26396491000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36149068800).

26396491000 is an abundant number, since it is smaller than the sum of its proper divisors (45901646600).

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

26396491000 is a wasteful number, since it uses less digits than its factorization.

26396491000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2487 (or 2473 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 40.

The spelling of 26396491000 in words is "twenty-six billion, three hundred ninety-six million, four hundred ninety-one thousand".