253965989504 has 16 divisors (see below), whose sum is σ = 505947869970. Its totient is φ = 126982994688.

The previous prime is 253965989491. The next prime is 253965989509. The reversal of 253965989504 is 405989569352.

It can be written as a sum of positive squares in only one way, i.e., 181346519104 + 72619470400 = 425848^2 + 269480^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (253965989509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 992054519 + ... + 992054774.

Almost surely, 2^253965989504 is an apocalyptic number.

It is an amenable number.

253965989504 is a deficient number, since it is larger than the sum of its proper divisors (251981880466).

253965989504 is an equidigital number, since it uses as much as digits as its factorization.

253965989504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1984109307 (or 1984109295 counting only the distinct ones).

The product of its (nonzero) digits is 104976000, while the sum is 65.

The spelling of 253965989504 in words is "two hundred fifty-three billion, nine hundred sixty-five million, nine hundred eighty-nine thousand, five hundred four".