53503404240 has 320 divisors, whose sum is σ = 198167316480. Its totient is φ = 11769415680.

The previous prime is 53503404193. The next prime is 53503404247. The reversal of 53503404240 is 4240430535.

It is a super-2 number, since 2×53503404240² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 53503404198 and 53503404207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53503404247) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2011669 + ... + 2038091.

It is an arithmetic number, because the mean of its divisors is an integer number (619272864).

Almost surely, 2^53503404240 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 53503404240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99083658240).

53503404240 is an abundant number, since it is smaller than the sum of its proper divisors (144663912240).

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

53503404240 is a wasteful number, since it uses less digits than its factorization.

53503404240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26522 (or 26516 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 30.

Adding to 53503404240 its reverse (4240430535), we get a palindrome (57743834775).

The spelling of 53503404240 in words is "fifty-three billion, five hundred three million, four hundred four thousand, two hundred forty".