26257807477445 has 8 divisors (see below), whose sum is σ = 31710065591544. Its totient is φ = 20872448236224.

The previous prime is 26257807477381. The next prime is 26257807477453. The reversal of 26257807477445 is 54477470875262.

It can be written as a sum of positive squares in 4 ways, for example, as 2441396875009 + 23816410602436 = 1562497^2 + 4880206^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26257807477445 - 2⁶ = 26257807477381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16724717354 + ... + 16724718923.

It is an arithmetic number, because the mean of its divisors is an integer number (3963758198943).

Almost surely, 2^{26257807477445} is an apocalyptic number.

It is an amenable number.

26257807477445 is a deficient number, since it is larger than the sum of its proper divisors (5452258114099).

26257807477445 is a wasteful number, since it uses less digits than its factorization.

26257807477445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33449436439.

The product of its (nonzero) digits is 737587200, while the sum is 68.

The spelling of 26257807477445 in words is "twenty-six trillion, two hundred fifty-seven billion, eight hundred seven million, four hundred seventy-seven thousand, four hundred forty-five".