555320432240 has 80 divisors (see below), whose sum is σ = 1494243886080. Its totient is φ = 187985491200.

The previous prime is 555320432207. The next prime is 555320432263. The reversal of 555320432240 is 42234023555.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 555320432240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6231986 + ... + 6320465.

It is an arithmetic number, because the mean of its divisors is an integer number (18678048576).

Almost surely, 2^555320432240 is an apocalyptic number.

It is an amenable number.

555320432240 is an abundant number, since it is smaller than the sum of its proper divisors (938923453840).

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

555320432240 is a wasteful number, since it uses less digits than its factorization.

555320432240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12552550 (or 12552544 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 35.

Adding to 555320432240 its reverse (42234023555), we get a palindrome (597554455795).

The spelling of 555320432240 in words is "five hundred fifty-five billion, three hundred twenty million, four hundred thirty-two thousand, two hundred forty".