53440436441021 has 8 divisors (see below), whose sum is σ = 61256015321280. Its totient is φ = 45670165265088.

The previous prime is 53440436441017. The next prime is 53440436441027. The reversal of 53440436441021 is 12014463404435.

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

It is not a de Polignac number, because 53440436441021 - 2² = 53440436441017 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53440436441021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53440436441027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11326923551 + ... + 11326928268.

It is an arithmetic number, because the mean of its divisors is an integer number (7657001915160).

Almost surely, 2^{53440436441021} is an apocalyptic number.

It is an amenable number.

53440436441021 is a deficient number, since it is larger than the sum of its proper divisors (7815578880259).

53440436441021 is a wasteful number, since it uses less digits than its factorization.

53440436441021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22653852163.

The product of its (nonzero) digits is 552960, while the sum is 41.

Adding to 53440436441021 its reverse (12014463404435), we get a palindrome (65454899845456).

The spelling of 53440436441021 in words is "fifty-three trillion, four hundred forty billion, four hundred thirty-six million, four hundred forty-one thousand, twenty-one".