43855242553 has 4 divisors (see below), whose sum is σ = 44509798480. Its totient is φ = 43200686628.

The previous prime is 43855242551. The next prime is 43855242577. The reversal of 43855242553 is 35524255834.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 43855242553 - 2¹ = 43855242551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43855242551) 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, 327277863 + ... + 327277996.

It is an arithmetic number, because the mean of its divisors is an integer number (11127449620).

Almost surely, 2^43855242553 is an apocalyptic number.

It is an amenable number.

43855242553 is a deficient number, since it is larger than the sum of its proper divisors (654555927).

43855242553 is an equidigital number, since it uses as much as digits as its factorization.

43855242553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654555926.

The product of its digits is 2880000, while the sum is 46.

The spelling of 43855242553 in words is "forty-three billion, eight hundred fifty-five million, two hundred forty-two thousand, five hundred fifty-three".