253044445545 has 96 divisors (see below), whose sum is σ = 496423759104. Its totient is φ = 118532198400.

The previous prime is 253044445541. The next prime is 253044445561. The reversal of 253044445545 is 545544440352.

It is a happy number.

253044445545 is a `hidden beast` number, since 2 + 53 + 0 + 4 + 4 + 44 + 554 + 5 = 666.

It is not a de Polignac number, because 253044445545 - 2² = 253044445541 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 253044445545.

It is not an unprimeable number, because it can be changed into a prime (253044445541) 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 95 ways as a sum of consecutive naturals, for example, 546010 + ... + 896780.

It is an arithmetic number, because the mean of its divisors is an integer number (5171080824).

Almost surely, 2^253044445545 is an apocalyptic number.

It is an amenable number.

253044445545 is a deficient number, since it is larger than the sum of its proper divisors (243379313559).

253044445545 is a wasteful number, since it uses less digits than its factorization.

253044445545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350863 (or 350860 counting only the distinct ones).

The product of its (nonzero) digits is 3840000, while the sum is 45.

Adding to 253044445545 its reverse (545544440352), we get a palindrome (798588885897).

The spelling of 253044445545 in words is "two hundred fifty-three billion, forty-four million, four hundred forty-five thousand, five hundred forty-five".