5155666505201 has 4 divisors (see below), whose sum is σ = 5156218454004. Its totient is φ = 5155114556400.

The previous prime is 5155666505161. The next prime is 5155666505237. The reversal of 5155666505201 is 1025056665515.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3266691145201 + 1888975360000 = 1807399^2 + 1374400^2 .

It is a cyclic number.

It is not a de Polignac number, because 5155666505201 - 2⁴² = 757619994097 is a prime.

It is a super-2 number, since 2×5155666505201² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5155666505251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275960390 + ... + 275979071.

It is an arithmetic number, because the mean of its divisors is an integer number (1289054613501).

Almost surely, 2^{5155666505201} is an apocalyptic number.

It is an amenable number.

5155666505201 is a deficient number, since it is larger than the sum of its proper divisors (551948803).

5155666505201 is an equidigital number, since it uses as much as digits as its factorization.

5155666505201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551948802.

The product of its (nonzero) digits is 1350000, while the sum is 47.

The spelling of 5155666505201 in words is "five trillion, one hundred fifty-five billion, six hundred sixty-six million, five hundred five thousand, two hundred one".