253997856319 has 2 divisors, whose sum is σ = 253997856320. Its totient is φ = 253997856318.

The previous prime is 253997856293. The next prime is 253997856391. The reversal of 253997856319 is 913658799352.

Together with next prime (253997856391) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 253997856319 - 2¹⁹ = 253997332031 is a prime.

It is a super-2 number, since 2×253997856319² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253997851319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126998928159 + 126998928160.

It is an arithmetic number, because the mean of its divisors is an integer number (126998928160).

Almost surely, 2^253997856319 is an apocalyptic number.

253997856319 is a deficient number, since it is larger than the sum of its proper divisors (1).

253997856319 is an equidigital number, since it uses as much as digits as its factorization.

253997856319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 110224800, while the sum is 67.

The spelling of 253997856319 in words is "two hundred fifty-three billion, nine hundred ninety-seven million, eight hundred fifty-six thousand, three hundred nineteen".