26786217042 has 96 divisors (see below), whose sum is σ = 66431933568. Its totient is φ = 7727298048.

The previous prime is 26786217041. The next prime is 26786217067. The reversal of 26786217042 is 24071268762.

It is a happy number.

It is a super-2 number, since 2×26786217042² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26786217041) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 1033413 + ... + 1059015.

It is an arithmetic number, because the mean of its divisors is an integer number (691999308).

Almost surely, 2^26786217042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26786217042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33215966784).

26786217042 is an abundant number, since it is smaller than the sum of its proper divisors (39645716526).

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

26786217042 is a wasteful number, since it uses less digits than its factorization.

26786217042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25904 (or 25901 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The spelling of 26786217042 in words is "twenty-six billion, seven hundred eighty-six million, two hundred seventeen thousand, forty-two".