26009810128 has 10 divisors (see below), whose sum is σ = 50394007154. Its totient is φ = 13004905056.

The previous prime is 26009810077. The next prime is 26009810129. The reversal of 26009810128 is 82101890062.

It can be written as a sum of positive squares in only one way, i.e., 16699875984 + 9309934144 = 129228^2 + 96488^2 .

It is a super-2 number, since 2×26009810128² (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 (26009810129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 812806551 + ... + 812806582.

Almost surely, 2^26009810128 is an apocalyptic number.

It is an amenable number.

26009810128 is a deficient number, since it is larger than the sum of its proper divisors (24384197026).

26009810128 is a wasteful number, since it uses less digits than its factorization.

26009810128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1625613141 (or 1625613135 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 37.

The spelling of 26009810128 in words is "twenty-six billion, nine million, eight hundred ten thousand, one hundred twenty-eight".