440043261253 has 4 divisors (see below), whose sum is σ = 440300748780. Its totient is φ = 439785773728.

The previous prime is 440043261209. The next prime is 440043261347. The reversal of 440043261253 is 352162340044.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42560927809 + 397482333444 = 206303^2 + 630462^2 .

It is a cyclic number.

It is not a de Polignac number, because 440043261253 - 2²⁹ = 439506390341 is a prime.

It is a super-2 number, since 2×440043261253² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440043211253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128741200 + ... + 128744617.

It is an arithmetic number, because the mean of its divisors is an integer number (110075187195).

Almost surely, 2^440043261253 is an apocalyptic number.

It is an amenable number.

440043261253 is a deficient number, since it is larger than the sum of its proper divisors (257487527).

440043261253 is a wasteful number, since it uses less digits than its factorization.

440043261253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257487526.

The product of its (nonzero) digits is 69120, while the sum is 34.

The spelling of 440043261253 in words is "four hundred forty billion, forty-three million, two hundred sixty-one thousand, two hundred fifty-three".