53511440664 has 64 divisors (see below), whose sum is σ = 146148986880. Its totient is φ = 16192400000.

The previous prime is 53511440663. The next prime is 53511440681. The reversal of 53511440664 is 46604411535.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53511440663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40489 + ... + 329639.

It is an arithmetic number, because the mean of its divisors is an integer number (2283577920).

Almost surely, 2^53511440664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53511440664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73074493440).

53511440664 is an abundant number, since it is smaller than the sum of its proper divisors (92637546216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53511440664 is a wasteful number, since it uses less digits than its factorization.

53511440664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289872 (or 289868 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

The spelling of 53511440664 in words is "fifty-three billion, five hundred eleven million, four hundred forty thousand, six hundred sixty-four".