253686985389 has 6 divisors (see below), whose sum is σ = 366436756686. Its totient is φ = 169124656920.

The previous prime is 253686985361. The next prime is 253686985403. The reversal of 253686985389 is 983589686352.

253686985389 is a `hidden beast` number, since 2 + 5 + 3 + 6 + 86 + 9 + 8 + 538 + 9 = 666.

253686985389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 247523165289 + 6163820100 = 497517^2 + 78510^2 .

It is not a de Polignac number, because 253686985389 - 2¹² = 253686981293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253686985589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14093721402 + ... + 14093721419.

It is an arithmetic number, because the mean of its divisors is an integer number (61072792781).

Almost surely, 2^253686985389 is an apocalyptic number.

It is an amenable number.

253686985389 is a deficient number, since it is larger than the sum of its proper divisors (112749771297).

253686985389 is a wasteful number, since it uses less digits than its factorization.

253686985389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28187442827 (or 28187442824 counting only the distinct ones).

The product of its digits is 671846400, while the sum is 72.

The spelling of 253686985389 in words is "two hundred fifty-three billion, six hundred eighty-six million, nine hundred eighty-five thousand, three hundred eighty-nine".