1638054013 has 2 divisors, whose sum is σ = 1638054014. Its totient is φ = 1638054012.

The previous prime is 1638053969. The next prime is 1638054029. The reversal of 1638054013 is 3104508361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1508390244 + 129663769 = 38838^2 + 11387^2 .

It is a cyclic number.

It is not a de Polignac number, because 1638054013 - 2¹³ = 1638045821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1638054113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 819027006 + 819027007.

It is an arithmetic number, because the mean of its divisors is an integer number (819027007).

Almost surely, 2^1638054013 is an apocalyptic number.

It is an amenable number.

1638054013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1638054013 is an equidigital number, since it uses as much as digits as its factorization.

1638054013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1638054013 is about 40472.8799691843. The cubic root of 1638054013 is about 1178.8070901939.

The spelling of 1638054013 in words is "one billion, six hundred thirty-eight million, fifty-four thousand, thirteen".