55421435335320 has 256 divisors, whose sum is σ = 191223082800000. Its totient is φ = 14260863891456.

The previous prime is 55421435335289. The next prime is 55421435335327. The reversal of 55421435335320 is 2353353412455.

55421435335320 is a `hidden beast` number, since 5 + 5 + 4 + 2 + 1 + 43 + 533 + 53 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55421435335327) 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, 51742966 + ... + 52803194.

Almost surely, 2^{55421435335320} 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 55421435335320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95611541400000).

55421435335320 is an abundant number, since it is smaller than the sum of its proper divisors (135801647464680).

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

55421435335320 is a wasteful number, since it uses less digits than its factorization.

55421435335320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061947 (or 1061937 counting only the distinct ones).

The product of its (nonzero) digits is 3240000, while the sum is 45.

Adding to 55421435335320 its reverse (2353353412455), we get a palindrome (57774788747775).

The spelling of 55421435335320 in words is "fifty-five trillion, four hundred twenty-one billion, four hundred thirty-five million, three hundred thirty-five thousand, three hundred twenty".