253945334543418 has 96 divisors (see below), whose sum is σ = 634191187968000. Its totient is φ = 71936475801120.

The previous prime is 253945334543389. The next prime is 253945334543443. The reversal of 253945334543418 is 814345433549352.

253945334543418 is a `hidden beast` number, since 2 + 5 + 3 + 9 + 4 + 53 + 34 + 543 + 4 + 1 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18693603 + ... + 29280393.

It is an arithmetic number, because the mean of its divisors is an integer number (6606158208000).

Almost surely, 2^{253945334543418} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 253945334543418, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (317095593984000).

253945334543418 is an abundant number, since it is smaller than the sum of its proper divisors (380245853424582).

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

253945334543418 is a wasteful number, since it uses less digits than its factorization.

253945334543418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10588432 (or 10588429 counting only the distinct ones).

The product of its digits is 373248000, while the sum is 63.

The spelling of 253945334543418 in words is "two hundred fifty-three trillion, nine hundred forty-five billion, three hundred thirty-four million, five hundred forty-three thousand, four hundred eighteen".