254040405005 has 4 divisors (see below), whose sum is σ = 304848486012. Its totient is φ = 203232324000.

The previous prime is 254040404909. The next prime is 254040405011. The reversal of 254040405005 is 500504040452.

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 196814675044 + 57225729961 = 443638^2 + 239219^2 .

It is not a de Polignac number, because 254040405005 - 2⁸ = 254040404749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25404040496 + ... + 25404040505.

It is an arithmetic number, because the mean of its divisors is an integer number (76212121503).

Almost surely, 2^254040405005 is an apocalyptic number.

It is an amenable number.

254040405005 is a deficient number, since it is larger than the sum of its proper divisors (50808081007).

254040405005 is an equidigital number, since it uses as much as digits as its factorization.

254040405005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50808081006.

The product of its (nonzero) digits is 16000, while the sum is 29.

Adding to 254040405005 its reverse (500504040452), we get a palindrome (754544445457).

The spelling of 254040405005 in words is "two hundred fifty-four billion, forty million, four hundred five thousand, five".