253968626209 has 9 divisors (see below), whose sum is σ = 265502949649. Its totient is φ = 242915425060.

The previous prime is 253968626189. The next prime is 253968626227. The reversal of 253968626209 is 902626869352.

The square root of 253968626209 is 503953.

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

It is not a de Polignac number, because 253968626209 - 2³¹ = 251821142561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253968626279) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11579964 + ... + 11601874.

Almost surely, 2^253968626209 is an apocalyptic number.

253968626209 is the 503953-rd square number.

253968626209 is the 251977-th centered octagonal number.

It is an amenable number.

253968626209 is a deficient number, since it is larger than the sum of its proper divisors (11534323440).

253968626209 is an frugal number, since it uses more digits than its factorization.

253968626209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43868 (or 21934 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 58.

The spelling of 253968626209 in words is "two hundred fifty-three billion, nine hundred sixty-eight million, six hundred twenty-six thousand, two hundred nine".