55555725081 has 16 divisors (see below), whose sum is σ = 75429489600. Its totient is φ = 36361217088.

The previous prime is 55555725077. The next prime is 55555725083. The reversal of 55555725081 is 18052755555.

It is not a de Polignac number, because 55555725081 - 2² = 55555725077 is a prime.

It is a super-2 number, since 2×55555725081² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55555725081.

It is not an unprimeable number, because it can be changed into a prime (55555725083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73326 + ... + 341303.

It is an arithmetic number, because the mean of its divisors is an integer number (4714343100).

Almost surely, 2^55555725081 is an apocalyptic number.

It is an amenable number.

55555725081 is a deficient number, since it is larger than the sum of its proper divisors (19873764519).

55555725081 is a wasteful number, since it uses less digits than its factorization.

55555725081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415448.

The product of its (nonzero) digits is 1750000, while the sum is 48.

The spelling of 55555725081 in words is "fifty-five billion, five hundred fifty-five million, seven hundred twenty-five thousand, eighty-one".