55055000500081 has 2 divisors, whose sum is σ = 55055000500082. Its totient is φ = 55055000500080.

The previous prime is 55055000499949. The next prime is 55055000500099. The reversal of 55055000500081 is 18000500055055.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54649943353600 + 405057146481 = 7392560^2 + 636441^2 .

It is a cyclic number.

It is not a de Polignac number, because 55055000500081 - 2¹¹ = 55055000498033 is a prime.

It is a super-2 number, since 2×55055000500081² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55055000500481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27527500250040 + 27527500250041.

It is an arithmetic number, because the mean of its divisors is an integer number (27527500250041).

Almost surely, 2^{55055000500081} is an apocalyptic number.

It is an amenable number.

55055000500081 is a deficient number, since it is larger than the sum of its proper divisors (1).

55055000500081 is an equidigital number, since it uses as much as digits as its factorization.

55055000500081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25000, while the sum is 34.

The spelling of 55055000500081 in words is "fifty-five trillion, fifty-five billion, five hundred thousand, eighty-one".