26109781880 has 64 divisors (see below), whose sum is σ = 72304021440. Its totient is φ = 8263314432.

The previous prime is 26109781877. The next prime is 26109781889. The reversal of 26109781880 is 8818790162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26109781889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3582869 + ... + 3590148.

It is an arithmetic number, because the mean of its divisors is an integer number (1129750335).

Almost surely, 2^26109781880 is an apocalyptic number.

26109781880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26109781880 is an abundant number, since it is smaller than the sum of its proper divisors (46194239560).

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

26109781880 is a wasteful number, since it uses less digits than its factorization.

26109781880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7173048 (or 7173044 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 50.

The spelling of 26109781880 in words is "twenty-six billion, one hundred nine million, seven hundred eighty-one thousand, eight hundred eighty".