55381860726216 has 128 divisors (see below), whose sum is σ = 146375000217600. Its totient is φ = 17413045632000.

The previous prime is 55381860726109. The next prime is 55381860726217. The reversal of 55381860726216 is 61262706818355.

It is a self number, because there is not a number n which added to its sum of digits gives 55381860726216.

It is not an unprimeable number, because it can be changed into a prime (55381860726217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 596798781 + ... + 596891571.

It is an arithmetic number, because the mean of its divisors is an integer number (1143554689200).

Almost surely, 2^{55381860726216} 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 55381860726216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73187500108800).

55381860726216 is an abundant number, since it is smaller than the sum of its proper divisors (90993139491384).

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

55381860726216 is a wasteful number, since it uses less digits than its factorization.

55381860726216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98491 (or 98487 counting only the distinct ones).

The product of its (nonzero) digits is 29030400, while the sum is 60.

The spelling of 55381860726216 in words is "fifty-five trillion, three hundred eighty-one billion, eight hundred sixty million, seven hundred twenty-six thousand, two hundred sixteen".