2138648936 has 16 divisors (see below), whose sum is σ = 4066446240. Its totient is φ = 1054263280.

The previous prime is 2138648917. The next prime is 2138648969. The reversal of 2138648936 is 6398468312.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1882046 + ... + 1883181.

It is an arithmetic number, because the mean of its divisors is an integer number (254152890).

Almost surely, 2^2138648936 is an apocalyptic number.

It is an amenable number.

2138648936 is a deficient number, since it is larger than the sum of its proper divisors (1927797304).

2138648936 is a wasteful number, since it uses less digits than its factorization.

2138648936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3765304 (or 3765300 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 50.

The square root of 2138648936 is about 46245.5288217142. The cubic root of 2138648936 is about 1288.3874922363.

The spelling of 2138648936 in words is "two billion, one hundred thirty-eight million, six hundred forty-eight thousand, nine hundred thirty-six".