53444553623 has 4 divisors (see below), whose sum is σ = 54121067040. Its totient is φ = 52768040208.

The previous prime is 53444553619. The next prime is 53444553649. The reversal of 53444553623 is 32635544435.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 53444553623 - 2² = 53444553619 is a prime.

It is a super-2 number, since 2×53444553623² (a number of 22 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 (53444553653) 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 3 ways as a sum of consecutive naturals, for example, 338256590 + ... + 338256747.

It is an arithmetic number, because the mean of its divisors is an integer number (13530266760).

Almost surely, 2^53444553623 is an apocalyptic number.

53444553623 is a deficient number, since it is larger than the sum of its proper divisors (676513417).

53444553623 is an equidigital number, since it uses as much as digits as its factorization.

53444553623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676513416.

The product of its digits is 2592000, while the sum is 44.

The spelling of 53444553623 in words is "fifty-three billion, four hundred forty-four million, five hundred fifty-three thousand, six hundred twenty-three".