253303155440 has 40 divisors (see below), whose sum is σ = 594332882880. Its totient is φ = 100391705856.

The previous prime is 253303155389. The next prime is 253303155449. The reversal of 253303155440 is 44551303352.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 253303155440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253303155449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14515544 + ... + 14532983.

It is an arithmetic number, because the mean of its divisors is an integer number (14858322072).

Almost surely, 2^253303155440 is an apocalyptic number.

253303155440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253303155440 is an abundant number, since it is smaller than the sum of its proper divisors (341029727440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

253303155440 is a wasteful number, since it uses less digits than its factorization.

253303155440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29048649 (or 29048643 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 35.

Adding to 253303155440 its reverse (44551303352), we get a palindrome (297854458792).

The spelling of 253303155440 in words is "two hundred fifty-three billion, three hundred three million, one hundred fifty-five thousand, four hundred forty".