253004393403 has 16 divisors (see below), whose sum is σ = 374851338240. Its totient is φ = 168656089032.

The previous prime is 253004393371. The next prime is 253004393413. The reversal of 253004393403 is 304393400352.

253004393403 is a `hidden beast` number, since 2 + 5 + 300 + 4 + 3 + 9 + 340 + 3 = 666.

It is not a de Polignac number, because 253004393403 - 2⁵ = 253004393371 is a prime.

It is a super-2 number, since 2×253004393403² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (253004393413) 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 15 ways as a sum of consecutive naturals, for example, 25851 + ... + 711812.

It is an arithmetic number, because the mean of its divisors is an integer number (23428208640).

Almost surely, 2^253004393403 is an apocalyptic number.

253004393403 is a deficient number, since it is larger than the sum of its proper divisors (121846944837).

253004393403 is a wasteful number, since it uses less digits than its factorization.

253004393403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750375 (or 750369 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 36.

Adding to 253004393403 its reverse (304393400352), we get a palindrome (557397793755).

The spelling of 253004393403 in words is "two hundred fifty-three billion, four million, three hundred ninety-three thousand, four hundred three".