55000500500581 has 2 divisors, whose sum is σ = 55000500500582. Its totient is φ = 55000500500580.

The previous prime is 55000500500551. The next prime is 55000500500609. The reversal of 55000500500581 is 18500500500055.

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., 51002236312225 + 3998264188356 = 7141585^2 + 1999566^2 .

It is a cyclic number.

It is not a de Polignac number, because 55000500500581 - 2²¹ = 55000498403429 is a prime.

It is a super-2 number, since 2×55000500500581² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55000500500521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27500250250290 + 27500250250291.

It is an arithmetic number, because the mean of its divisors is an integer number (27500250250291).

Almost surely, 2^{55000500500581} is an apocalyptic number.

It is an amenable number.

55000500500581 is a deficient number, since it is larger than the sum of its proper divisors (1).

55000500500581 is an equidigital number, since it uses as much as digits as its factorization.

55000500500581 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 55000500500581 in words is "fifty-five trillion, five hundred million, five hundred thousand, five hundred eighty-one".