6401236253 has 8 divisors (see below), whose sum is σ = 6863575680. Its totient is φ = 5948429760.

The previous prime is 6401236189. The next prime is 6401236271. The reversal of 6401236253 is 3526321046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6401236253 - 2⁶ = 6401236189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6401236273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2381843 + ... + 2384528.

It is an arithmetic number, because the mean of its divisors is an integer number (857946960).

Almost surely, 2^6401236253 is an apocalyptic number.

It is an amenable number.

6401236253 is a deficient number, since it is larger than the sum of its proper divisors (462339427).

6401236253 is a wasteful number, since it uses less digits than its factorization.

6401236253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4766467.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 6401236253 is about 80007.7262081607. The cubic root of 6401236253 is about 1856.7550711261.

Adding to 6401236253 its reverse (3526321046), we get a palindrome (9927557299).

The spelling of 6401236253 in words is "six billion, four hundred one million, two hundred thirty-six thousand, two hundred fifty-three".