18198611629 has 6 divisors (see below), whose sum is σ = 20003432750. Its totient is φ = 16544192280.

The previous prime is 18198611603. The next prime is 18198611671. The reversal of 18198611629 is 92611689181.

It can be written as a sum of positive squares in only one way, i.e., 16442163529 + 1756448100 = 128227^2 + 41910^2 .

It is not a de Polignac number, because 18198611629 - 2²⁹ = 17661740717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18198611689) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 75200754 + ... + 75200995.

Almost surely, 2^18198611629 is an apocalyptic number.

It is an amenable number.

18198611629 is a deficient number, since it is larger than the sum of its proper divisors (1804821121).

18198611629 is a wasteful number, since it uses less digits than its factorization.

18198611629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150401771 (or 150401760 counting only the distinct ones).

The product of its digits is 373248, while the sum is 52.

The spelling of 18198611629 in words is "eighteen billion, one hundred ninety-eight million, six hundred eleven thousand, six hundred twenty-nine".