253656223236 has 144 divisors (see below), whose sum is σ = 739343732400. Its totient is φ = 72631443456.

The previous prime is 253656223211. The next prime is 253656223283. The reversal of 253656223236 is 632322656352.

253656223236 is a `hidden beast` number, since 2 + 5 + 36 + 562 + 23 + 2 + 36 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 4761000000 + 248895223236 = 69000^2 + 498894^2 .

It is a junction number, because it is equal to n+sod(n) for n = 253656223191 and 253656223200.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 528970 + ... + 887198.

It is an arithmetic number, because the mean of its divisors is an integer number (5134331475).

Almost surely, 2^253656223236 is an apocalyptic number.

253656223236 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 253656223236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (369671866200).

253656223236 is an abundant number, since it is smaller than the sum of its proper divisors (485687509164).

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

253656223236 is a wasteful number, since it uses less digits than its factorization.

253656223236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358358 (or 358353 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 45.

Adding to 253656223236 its reverse (632322656352), we get a palindrome (885978879588).

The spelling of 253656223236 in words is "two hundred fifty-three billion, six hundred fifty-six million, two hundred twenty-three thousand, two hundred thirty-six".