55381860726218 has 32 divisors (see below), whose sum is σ = 89508654668160. Its totient is φ = 25547819653440.

The previous prime is 55381860726217. The next prime is 55381860726299. The reversal of 55381860726218 is 81262706818355.

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 15 ways as a sum of consecutive naturals, for example, 415155053 + ... + 415288431.

It is an arithmetic number, because the mean of its divisors is an integer number (2797145458380).

Almost surely, 2^{55381860726218} is an apocalyptic number.

55381860726218 is a deficient number, since it is larger than the sum of its proper divisors (34126793941942).

55381860726218 is a wasteful number, since it uses less digits than its factorization.

55381860726218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141422.

The product of its (nonzero) digits is 38707200, while the sum is 62.

The spelling of 55381860726218 in words is "fifty-five trillion, three hundred eighty-one billion, eight hundred sixty million, seven hundred twenty-six thousand, two hundred eighteen".