553531231440 has 320 divisors, whose sum is σ = 2170369658880. Its totient is φ = 128354941440.

The previous prime is 553531231411. The next prime is 553531231459. The reversal of 553531231440 is 44132135355.

553531231440 is a `hidden beast` number, since 5 + 53 + 531 + 2 + 31 + 4 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 553531231395 and 553531231404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 40029 + ... + 1052931.

It is an arithmetic number, because the mean of its divisors is an integer number (6782405184).

Almost surely, 2^553531231440 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 553531231440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1085184829440).

553531231440 is an abundant number, since it is smaller than the sum of its proper divisors (1616838427440).

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

553531231440 is a wasteful number, since it uses less digits than its factorization.

553531231440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012959 (or 1012947 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

Adding to 553531231440 its reverse (44132135355), we get a palindrome (597663366795).

The spelling of 553531231440 in words is "five hundred fifty-three billion, five hundred thirty-one million, two hundred thirty-one thousand, four hundred forty".