26251265012641 has 4 divisors (see below), whose sum is σ = 26252056676484. Its totient is φ = 26250473348800.

The previous prime is 26251265012633. The next prime is 26251265012647. The reversal of 26251265012641 is 14621056215262.

It is a happy number.

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 11915924283025 + 14335340729616 = 3451945^2 + 3786204^2 .

It is a cyclic number.

It is not a de Polignac number, because 26251265012641 - 2³ = 26251265012633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26251265012647) 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, 395782180 + ... + 395848501.

It is an arithmetic number, because the mean of its divisors is an integer number (6563014169121).

Almost surely, 2^{26251265012641} is an apocalyptic number.

It is an amenable number.

26251265012641 is a deficient number, since it is larger than the sum of its proper divisors (791663843).

26251265012641 is an equidigital number, since it uses as much as digits as its factorization.

26251265012641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791663842.

The product of its (nonzero) digits is 345600, while the sum is 43.

The spelling of 26251265012641 in words is "twenty-six trillion, two hundred fifty-one billion, two hundred sixty-five million, twelve thousand, six hundred forty-one".