3687918299081 has 2 divisors, whose sum is σ = 3687918299082. Its totient is φ = 3687918299080.

The previous prime is 3687918299069. The next prime is 3687918299089. The reversal of 3687918299081 is 1809928197863.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3519691175056 + 168227124025 = 1876084^2 + 410155^2 .

It is an emirp because it is prime and its reverse (1809928197863) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3687918299081 - 2¹⁸ = 3687918036937 is a prime.

It is a super-2 number, since 2×3687918299081² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3687918298996 and 3687918299014.

It is not a weakly prime, because it can be changed into another prime (3687918299089) 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 as a sum of consecutive naturals, namely, 1843959149540 + 1843959149541.

It is an arithmetic number, because the mean of its divisors is an integer number (1843959149541).

Almost surely, 2^{3687918299081} is an apocalyptic number.

It is an amenable number.

3687918299081 is a deficient number, since it is larger than the sum of its proper divisors (1).

3687918299081 is an equidigital number, since it uses as much as digits as its factorization.

3687918299081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94058496, while the sum is 71.

The spelling of 3687918299081 in words is "three trillion, six hundred eighty-seven billion, nine hundred eighteen million, two hundred ninety-nine thousand, eighty-one".