53253660440 has 64 divisors (see below), whose sum is σ = 123131244960. Its totient is φ = 20713605120.

The previous prime is 53253660431. The next prime is 53253660469. The reversal of 53253660440 is 4406635235.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 53253660394 and 53253660403.

It is a congruent number.

It is an unprimeable number.

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, 2762435 + ... + 2781645.

Almost surely, 2^53253660440 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 53253660440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61565622480).

53253660440 is an abundant number, since it is smaller than the sum of its proper divisors (69877584520).

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

53253660440 is a wasteful number, since it uses less digits than its factorization.

53253660440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21132 (or 21128 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 38.

The spelling of 53253660440 in words is "fifty-three billion, two hundred fifty-three million, six hundred sixty thousand, four hundred forty".