26400455121 has 4 divisors (see below), whose sum is σ = 35200606832. Its totient is φ = 17600303412.

The previous prime is 26400455113. The next prime is 26400455131. The reversal of 26400455121 is 12155400462.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 26400455121 - 2³ = 26400455113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26400455111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4400075851 + ... + 4400075856.

It is an arithmetic number, because the mean of its divisors is an integer number (8800151708).

Almost surely, 2^26400455121 is an apocalyptic number.

It is an amenable number.

26400455121 is a deficient number, since it is larger than the sum of its proper divisors (8800151711).

26400455121 is an equidigital number, since it uses as much as digits as its factorization.

26400455121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8800151710.

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 26400455121 its reverse (12155400462), we get a palindrome (38555855583).

The spelling of 26400455121 in words is "twenty-six billion, four hundred million, four hundred fifty-five thousand, one hundred twenty-one".