5518100681 has 2 divisors, whose sum is σ = 5518100682. Its totient is φ = 5518100680.

The previous prime is 5518100641. The next prime is 5518100699. The reversal of 5518100681 is 1860018155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3246720400 + 2271380281 = 56980^2 + 47659^2 .

It is a cyclic number.

It is not a de Polignac number, because 5518100681 - 2²⁶ = 5450991817 is a prime.

It is a super-2 number, since 2×5518100681² = 60898870251305327522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5518100641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2759050340 + 2759050341.

It is an arithmetic number, because the mean of its divisors is an integer number (2759050341).

Almost surely, 2^5518100681 is an apocalyptic number.

It is an amenable number.

5518100681 is a deficient number, since it is larger than the sum of its proper divisors (1).

5518100681 is an equidigital number, since it uses as much as digits as its factorization.

5518100681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 35.

The square root of 5518100681 is about 74283.9193971347. The cubic root of 5518100681 is about 1767.1084626948.

The spelling of 5518100681 in words is "five billion, five hundred eighteen million, one hundred thousand, six hundred eighty-one".