18064819413631 has 2 divisors, whose sum is σ = 18064819413632. Its totient is φ = 18064819413630.

The previous prime is 18064819413607. The next prime is 18064819413761. The reversal of 18064819413631 is 13631491846081.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18064819413631 is a prime.

It is a super-2 number, since 2×18064819413631² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18064819413931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9032409706815 + 9032409706816.

It is an arithmetic number, because the mean of its divisors is an integer number (9032409706816).

Almost surely, 2^{18064819413631} is an apocalyptic number.

18064819413631 is a deficient number, since it is larger than the sum of its proper divisors (1).

18064819413631 is an equidigital number, since it uses as much as digits as its factorization.

18064819413631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2985984, while the sum is 55.

The spelling of 18064819413631 in words is "eighteen trillion, sixty-four billion, eight hundred nineteen million, four hundred thirteen thousand, six hundred thirty-one".