253205023626 has 56 divisors (see below), whose sum is σ = 569698168644. Its totient is φ = 84365012160.

The previous prime is 253205023579. The next prime is 253205023637. The reversal of 253205023626 is 626320502352.

253205023626 is a `hidden beast` number, since 2 + 5 + 3 + 2 + 0 + 5 + 0 + 23 + 626 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 221092742025 + 32112281601 = 470205^2 + 179199^2 .

It is a super-2 number, since 2×253205023626² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 3429136 + ... + 3502196.

Almost surely, 2^253205023626 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 253205023626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284849084322).

253205023626 is an abundant number, since it is smaller than the sum of its proper divisors (316493145018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

253205023626 is an equidigital number, since it uses as much as digits as its factorization.

253205023626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75458 (or 75443 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 36.

Adding to 253205023626 its reverse (626320502352), we get a palindrome (879525525978).

The spelling of 253205023626 in words is "two hundred fifty-three billion, two hundred five million, twenty-three thousand, six hundred twenty-six".