253400435643 has 8 divisors (see below), whose sum is σ = 357741791568. Its totient is φ = 158996351744.

The previous prime is 253400435567. The next prime is 253400435669. The reversal of 253400435643 is 346534004352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 253400435643 - 2¹⁰ = 253400434619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (253400435143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2484317946 + ... + 2484318047.

It is an arithmetic number, because the mean of its divisors is an integer number (44717723946).

Almost surely, 2^253400435643 is an apocalyptic number.

253400435643 is a deficient number, since it is larger than the sum of its proper divisors (104341355925).

253400435643 is a wasteful number, since it uses less digits than its factorization.

253400435643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4968636013.

The product of its (nonzero) digits is 518400, while the sum is 39.

Adding to 253400435643 its reverse (346534004352), we get a palindrome (599934439995).

The spelling of 253400435643 in words is "two hundred fifty-three billion, four hundred million, four hundred thirty-five thousand, six hundred forty-three".