254340555257 has 16 divisors (see below), whose sum is σ = 267872786832. Its totient is φ = 241171706880.

The previous prime is 254340555251. The next prime is 254340555277. The reversal of 254340555257 is 752555043452.

It can be written as a sum of positive squares in 8 ways, for example, as 812193001 + 253528362256 = 28499^2 + 503516^2 .

It is not a de Polignac number, because 254340555257 - 2¹⁶ = 254340489721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (254340555251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1331963 + ... + 1510895.

It is an arithmetic number, because the mean of its divisors is an integer number (16742049177).

Almost surely, 2^254340555257 is an apocalyptic number.

It is an amenable number.

254340555257 is a deficient number, since it is larger than the sum of its proper divisors (13532231575).

254340555257 is a wasteful number, since it uses less digits than its factorization.

254340555257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179948.

The product of its (nonzero) digits is 4200000, while the sum is 47.

The spelling of 254340555257 in words is "two hundred fifty-four billion, three hundred forty million, five hundred fifty-five thousand, two hundred fifty-seven".