26106243521 has 4 divisors (see below), whose sum is σ = 26108022612. Its totient is φ = 26104464432.

The previous prime is 26106243491. The next prime is 26106243533. The reversal of 26106243521 is 12534260162.

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 20025363121 + 6080880400 = 141511^2 + 77980^2 .

It is a cyclic number.

It is not a de Polignac number, because 26106243521 - 2¹⁴ = 26106227137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26106243551) 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, 867350 + ... + 896943.

It is an arithmetic number, because the mean of its divisors is an integer number (6527005653).

Almost surely, 2^26106243521 is an apocalyptic number.

It is an amenable number.

26106243521 is a deficient number, since it is larger than the sum of its proper divisors (1779091).

26106243521 is a wasteful number, since it uses less digits than its factorization.

26106243521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1779090.

The product of its (nonzero) digits is 17280, while the sum is 32.

The spelling of 26106243521 in words is "twenty-six billion, one hundred six million, two hundred forty-three thousand, five hundred twenty-one".