26400545 has 4 divisors (see below), whose sum is σ = 31680660. Its totient is φ = 21120432.

The previous prime is 26400509. The next prime is 26400547. The reversal of 26400545 is 54500462.

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 4787344 + 21613201 = 2188^2 + 4649^2 .

It is a cyclic number.

It is not a de Polignac number, because 26400545 - 2¹⁴ = 26384161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26400547) 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, 2640050 + ... + 2640059.

It is an arithmetic number, because the mean of its divisors is an integer number (7920165).

Almost surely, 2^26400545 is an apocalyptic number.

It is an amenable number.

26400545 is a deficient number, since it is larger than the sum of its proper divisors (5280115).

26400545 is an equidigital number, since it uses as much as digits as its factorization.

26400545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5280114.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 26400545 is about 5138.1460664329. The cubic root of 26400545 is about 297.7631595641.

The spelling of 26400545 in words is "twenty-six million, four hundred thousand, five hundred forty-five".