64401253 has 16 divisors (see below), whose sum is σ = 78257664. Its totient is φ = 51736320.

The previous prime is 64401251. The next prime is 64401263. The reversal of 64401253 is 35210446.

It is a cyclic number.

It is not a de Polignac number, because 64401253 - 2¹ = 64401251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64401251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31251 + ... + 33247.

It is an arithmetic number, because the mean of its divisors is an integer number (4891104).

Almost surely, 2^64401253 is an apocalyptic number.

It is an amenable number.

64401253 is a deficient number, since it is larger than the sum of its proper divisors (13856411).

64401253 is a wasteful number, since it uses less digits than its factorization.

64401253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2292.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 64401253 is about 8025.0391276305. The cubic root of 64401253 is about 400.8342028048.

Adding to 64401253 its reverse (35210446), we get a palindrome (99611699).

The spelling of 64401253 in words is "sixty-four million, four hundred one thousand, two hundred fifty-three".