53445644391 has 8 divisors (see below), whose sum is σ = 71262407664. Its totient is φ = 35629655360.

The previous prime is 53445644389. The next prime is 53445644411. The reversal of 53445644391 is 19344654435.

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

It is a cyclic number.

It is not a de Polignac number, because 53445644391 - 2¹ = 53445644389 is a prime.

It is a super-3 number, since 3×53445644391³ (a number of 33 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 53445644391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53445644591) 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 7 ways as a sum of consecutive naturals, for example, 6726 + ... + 327011.

It is an arithmetic number, because the mean of its divisors is an integer number (8907800958).

Almost surely, 2^53445644391 is an apocalyptic number.

53445644391 is a deficient number, since it is larger than the sum of its proper divisors (17816763273).

53445644391 is a wasteful number, since it uses less digits than its factorization.

53445644391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387121.

The product of its digits is 3110400, while the sum is 48.

The spelling of 53445644391 in words is "fifty-three billion, four hundred forty-five million, six hundred forty-four thousand, three hundred ninety-one".