253645238442 has 32 divisors (see below), whose sum is σ = 516513024000. Its totient is φ = 83014790768.

The previous prime is 253645238423. The next prime is 253645238449. The reversal of 253645238442 is 244832546352.

It is a junction number, because it is equal to n+sod(n) for n = 253645238391 and 253645238400.

It is not an unprimeable number, because it can be changed into a prime (253645238449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140442 + ... + 725957.

It is an arithmetic number, because the mean of its divisors is an integer number (16141032000).

Almost surely, 2^253645238442 is an apocalyptic number.

253645238442 is an abundant number, since it is smaller than the sum of its proper divisors (262867785558).

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

253645238442 is a wasteful number, since it uses less digits than its factorization.

253645238442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867290.

The product of its digits is 5529600, while the sum is 48.

The spelling of 253645238442 in words is "two hundred fifty-three billion, six hundred forty-five million, two hundred thirty-eight thousand, four hundred forty-two".