26540312505 has 32 divisors (see below), whose sum is σ = 48599443200. Its totient is φ = 12115567872.

The previous prime is 26540312479. The next prime is 26540312537. The reversal of 26540312505 is 50521304562.

It is not a de Polignac number, because 26540312505 - 2¹⁵ = 26540279737 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103810 + ... + 252699.

It is an arithmetic number, because the mean of its divisors is an integer number (1518732600).

Almost surely, 2^26540312505 is an apocalyptic number.

It is an amenable number.

26540312505 is a deficient number, since it is larger than the sum of its proper divisors (22059130695).

26540312505 is a wasteful number, since it uses less digits than its factorization.

26540312505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357233.

The product of its (nonzero) digits is 36000, while the sum is 33.

The spelling of 26540312505 in words is "twenty-six billion, five hundred forty million, three hundred twelve thousand, five hundred five".