55051353440420 has 96 divisors (see below), whose sum is σ = 122826453509088. Its totient is φ = 20654446804992.

The previous prime is 55051353440393. The next prime is 55051353440443. The reversal of 55051353440420 is 2404435315055.

It can be written as a sum of positive squares in 16 ways, for example, as 43591395254884 + 11459958185536 = 6602378^2 + 3385256^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 503631212 + ... + 503740508.

It is an arithmetic number, because the mean of its divisors is an integer number (1279442224053).

Almost surely, 2^{55051353440420} 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 55051353440420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61413226754544).

55051353440420 is an abundant number, since it is smaller than the sum of its proper divisors (67775100068668).

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

55051353440420 is a wasteful number, since it uses less digits than its factorization.

55051353440420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114369 (or 114367 counting only the distinct ones).

The product of its (nonzero) digits is 720000, while the sum is 41.

Adding to 55051353440420 its reverse (2404435315055), we get a palindrome (57455788755475).

The spelling of 55051353440420 in words is "fifty-five trillion, fifty-one billion, three hundred fifty-three million, four hundred forty thousand, four hundred twenty".