26126640909 has 16 divisors (see below), whose sum is σ = 38709547200. Its totient is φ = 17416225008.

The previous prime is 26126640889. The next prime is 26126640931. The reversal of 26126640909 is 90904662162.

26126640909 is a `hidden beast` number, since 261 + 266 + 40 + 90 + 9 = 666.

It is not a de Polignac number, because 26126640909 - 2³² = 21831673613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26126640109) 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, 327742 + ... + 399584.

It is an arithmetic number, because the mean of its divisors is an integer number (2419346700).

Almost surely, 2^26126640909 is an apocalyptic number.

It is an amenable number.

26126640909 is a deficient number, since it is larger than the sum of its proper divisors (12582906291).

26126640909 is a wasteful number, since it uses less digits than its factorization.

26126640909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85321 (or 85315 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The spelling of 26126640909 in words is "twenty-six billion, one hundred twenty-six million, six hundred forty thousand, nine hundred nine".