26809573857 has 32 divisors (see below), whose sum is σ = 41154048000. Its totient is φ = 15353346240.

The previous prime is 26809573841. The next prime is 26809573859. The reversal of 26809573857 is 75837590862.

It is not a de Polignac number, because 26809573857 - 2⁴ = 26809573841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26809573857.

It is not an unprimeable number, because it can be changed into a prime (26809573859) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 188944 + ... + 298862.

It is an arithmetic number, because the mean of its divisors is an integer number (1286064000).

Almost surely, 2^26809573857 is an apocalyptic number.

It is an amenable number.

26809573857 is a deficient number, since it is larger than the sum of its proper divisors (14344474143).

26809573857 is a wasteful number, since it uses less digits than its factorization.

26809573857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110341.

The product of its (nonzero) digits is 25401600, while the sum is 60.

The spelling of 26809573857 in words is "twenty-six billion, eight hundred nine million, five hundred seventy-three thousand, eight hundred fifty-seven".