5181015665 has 16 divisors (see below), whose sum is σ = 7479361920. Its totient is φ = 3365712000.

The previous prime is 5181015643. The next prime is 5181015667. The reversal of 5181015665 is 5665101815.

It is not a de Polignac number, because 5181015665 - 2⁸ = 5181015409 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5181015667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3894836 + ... + 3896165.

It is an arithmetic number, because the mean of its divisors is an integer number (467460120).

Almost surely, 2^5181015665 is an apocalyptic number.

It is an amenable number.

5181015665 is a deficient number, since it is larger than the sum of its proper divisors (2298346255).

5181015665 is a wasteful number, since it uses less digits than its factorization.

5181015665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7791032.

The product of its (nonzero) digits is 36000, while the sum is 38.

The square root of 5181015665 is about 71979.2724678431. The cubic root of 5181015665 is about 1730.3673098259.

The spelling of 5181015665 in words is "five billion, one hundred eighty-one million, fifteen thousand, six hundred sixty-five".