2118639508 has 6 divisors (see below), whose sum is σ = 3707619146. Its totient is φ = 1059319752.

The previous prime is 2118639473. The next prime is 2118639511. The reversal of 2118639508 is 8059368112.

It can be written as a sum of positive squares in only one way, i.e., 2108830084 + 9809424 = 45922^2 + 3132^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 264829935 + ... + 264829942.

Almost surely, 2^2118639508 is an apocalyptic number.

It is an amenable number.

2118639508 is a deficient number, since it is larger than the sum of its proper divisors (1588979638).

2118639508 is a wasteful number, since it uses less digits than its factorization.

2118639508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529659881 (or 529659879 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 2118639508 is about 46028.6813628199. The cubic root of 2118639508 is about 1284.3567984215.

The spelling of 2118639508 in words is "two billion, one hundred eighteen million, six hundred thirty-nine thousand, five hundred eight".