26405430404 has 48 divisors (see below), whose sum is σ = 50365466928. Its totient is φ = 12065783808.

The previous prime is 26405430383. The next prime is 26405430433. The reversal of 26405430404 is 40403450462.

It can be written as a sum of positive squares in 8 ways, for example, as 2652456004 + 23752974400 = 51502^2 + 154120^2 .

It is a super-3 number, since 3×26405430404³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 311822 + ... + 387354.

It is an arithmetic number, because the mean of its divisors is an integer number (1049280561).

Almost surely, 2^26405430404 is an apocalyptic number.

It is an amenable number.

26405430404 is a deficient number, since it is larger than the sum of its proper divisors (23960036524).

26405430404 is a wasteful number, since it uses less digits than its factorization.

26405430404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75704 (or 75702 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 32.

Adding to 26405430404 its reverse (40403450462), we get a palindrome (66808880866).

The spelling of 26405430404 in words is "twenty-six billion, four hundred five million, four hundred thirty thousand, four hundred four".