18632160649 has 2 divisors, whose sum is σ = 18632160650. Its totient is φ = 18632160648.

The previous prime is 18632160607. The next prime is 18632160683. The reversal of 18632160649 is 94606123681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9827153424 + 8805007225 = 99132^2 + 93835^2 .

It is a cyclic number.

It is not a de Polignac number, because 18632160649 - 2²⁷ = 18497942921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18632160599 and 18632160608.

It is not a weakly prime, because it can be changed into another prime (18632160049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9316080324 + 9316080325.

It is an arithmetic number, because the mean of its divisors is an integer number (9316080325).

Almost surely, 2^18632160649 is an apocalyptic number.

It is an amenable number.

18632160649 is a deficient number, since it is larger than the sum of its proper divisors (1).

18632160649 is an equidigital number, since it uses as much as digits as its factorization.

18632160649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 46.

The spelling of 18632160649 in words is "eighteen billion, six hundred thirty-two million, one hundred sixty thousand, six hundred forty-nine".