253445434001553 has 16 divisors (see below), whose sum is σ = 338636956956480. Its totient is φ = 168608981477376.

The previous prime is 253445434001449. The next prime is 253445434001579. The reversal of 253445434001553 is 355100434544352.

It is not a de Polignac number, because 253445434001553 - 2⁹ = 253445434001041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (253445434001653) 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 15 ways as a sum of consecutive naturals, for example, 22101975 + ... + 31549772.

It is an arithmetic number, because the mean of its divisors is an integer number (21164809809780).

Almost surely, 2^{253445434001553} is an apocalyptic number.

It is an amenable number.

253445434001553 is a deficient number, since it is larger than the sum of its proper divisors (85191522954927).

253445434001553 is a wasteful number, since it uses less digits than its factorization.

253445434001553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53655056.

The product of its (nonzero) digits is 8640000, while the sum is 48.

The spelling of 253445434001553 in words is "two hundred fifty-three trillion, four hundred forty-five billion, four hundred thirty-four million, one thousand, five hundred fifty-three".