26505513401 has 4 divisors (see below), whose sum is σ = 26508096804. Its totient is φ = 26502930000.

The previous prime is 26505513317. The next prime is 26505513403. The reversal of 26505513401 is 10431550562.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18000247225 + 8505266176 = 134165^2 + 92224^2 .

It is a cyclic number.

It is not a de Polignac number, because 26505513401 - 2¹⁰ = 26505512377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26505513403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1276250 + ... + 1296851.

It is an arithmetic number, because the mean of its divisors is an integer number (6627024201).

Almost surely, 2^26505513401 is an apocalyptic number.

It is an amenable number.

26505513401 is a deficient number, since it is larger than the sum of its proper divisors (2583403).

26505513401 is a wasteful number, since it uses less digits than its factorization.

26505513401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2583402.

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 26505513401 in words is "twenty-six billion, five hundred five million, five hundred thirteen thousand, four hundred one".