253898077689 has 15 divisors (see below), whose sum is σ = 379286618997. Its totient is φ = 169262361828.

The previous prime is 253898077687. The next prime is 253898077721. The reversal of 253898077689 is 986770898352.

The square root of 253898077689 is 503883.

It is a perfect power (a square), and thus also a powerful number.

253898077689 is a `hidden beast` number, since 2 + 538 + 9 + 8 + 0 + 7 + 7 + 6 + 89 = 666.

It is not a de Polignac number, because 253898077689 - 2¹ = 253898077687 is a prime.

It is not an unprimeable number, because it can be changed into a prime (253898077687) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 4506954 + ... + 4562940.

Almost surely, 2^253898077689 is an apocalyptic number.

253898077689 is the 503883-rd square number.

253898077689 is the 251942-nd centered octagonal number.

It is an amenable number.

253898077689 is a deficient number, since it is larger than the sum of its proper divisors (125388541308).

253898077689 is an frugal number, since it uses more digits than its factorization.

253898077689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111986 (or 55990 counting only the distinct ones).

The product of its (nonzero) digits is 365783040, while the sum is 72.

The spelling of 253898077689 in words is "two hundred fifty-three billion, eight hundred ninety-eight million, seventy-seven thousand, six hundred eighty-nine".