5015611681 has 2 divisors, whose sum is σ = 5015611682. Its totient is φ = 5015611680.

The previous prime is 5015611673. The next prime is 5015611687. The reversal of 5015611681 is 1861165105.

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., 5009808400 + 5803281 = 70780^2 + 2409^2 .

It is a cyclic number.

It is not a de Polignac number, because 5015611681 - 2³ = 5015611673 is a prime.

It is a super-2 number, since 2×5015611681² = 50312721069167291522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5015611687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2507805840 + 2507805841.

It is an arithmetic number, because the mean of its divisors is an integer number (2507805841).

Almost surely, 2^5015611681 is an apocalyptic number.

It is an amenable number.

5015611681 is a deficient number, since it is larger than the sum of its proper divisors (1).

5015611681 is an equidigital number, since it uses as much as digits as its factorization.

5015611681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 34.

The square root of 5015611681 is about 70820.9833382734. The cubic root of 5015611681 is about 1711.7538042021.

Adding to 5015611681 its reverse (1861165105), we get a palindrome (6876776786).

The spelling of 5015611681 in words is "five billion, fifteen million, six hundred eleven thousand, six hundred eighty-one".