18761275080637 has 2 divisors, whose sum is σ = 18761275080638. Its totient is φ = 18761275080636.

The previous prime is 18761275080601. The next prime is 18761275080707. The reversal of 18761275080637 is 73608057216781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13256742642361 + 5504532438276 = 3640981^2 + 2346174^2 .

It is an emirp because it is prime and its reverse (73608057216781) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18761275080637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18761272080637) 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, 9380637540318 + 9380637540319.

It is an arithmetic number, because the mean of its divisors is an integer number (9380637540319).

Almost surely, 2^{18761275080637} is an apocalyptic number.

It is an amenable number.

18761275080637 is a deficient number, since it is larger than the sum of its proper divisors (1).

18761275080637 is an equidigital number, since it uses as much as digits as its factorization.

18761275080637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23708160, while the sum is 61.

The spelling of 18761275080637 in words is "eighteen trillion, seven hundred sixty-one billion, two hundred seventy-five million, eighty thousand, six hundred thirty-seven".