253444425134449 has 4 divisors (see below), whose sum is σ = 257227177748464. Its totient is φ = 249661672520436.

The previous prime is 253444425134447. The next prime is 253444425134477. The reversal of 253444425134449 is 944431524444352.

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 253444425134449 - 2¹ = 253444425134447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 253444425134393 and 253444425134402.

It is not an unprimeable number, because it can be changed into a prime (253444425134443) 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, 1891376306907 + ... + 1891376307040.

It is an arithmetic number, because the mean of its divisors is an integer number (64306794437116).

Almost surely, 2^{253444425134449} is an apocalyptic number.

It is an amenable number.

253444425134449 is a deficient number, since it is larger than the sum of its proper divisors (3782752614015).

253444425134449 is an equidigital number, since it uses as much as digits as its factorization.

253444425134449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3782752614014.

The product of its digits is 132710400, while the sum is 58.

The spelling of 253444425134449 in words is "two hundred fifty-three trillion, four hundred forty-four billion, four hundred twenty-five million, one hundred thirty-four thousand, four hundred forty-nine".