2538649818 has 24 divisors (see below), whose sum is σ = 5528915028. Its totient is φ = 841830912.

The previous prime is 2538649811. The next prime is 2538649819. The reversal of 2538649818 is 8189468352.

2538649818 is a `hidden beast` number, since 2 + 538 + 6 + 4 + 98 + 18 = 666.

2538649818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2196140769 + 342509049 = 46863^2 + 18507^2 .

It is not an unprimeable number, because it can be changed into a prime (2538649811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 361905 + ... + 368852.

Almost surely, 2^2538649818 is an apocalyptic number.

2538649818 is an abundant number, since it is smaller than the sum of its proper divisors (2990265210).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2538649818 is a wasteful number, since it uses less digits than its factorization.

2538649818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730958 (or 730955 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 54.

The square root of 2538649818 is about 50385.0158082738. The cubic root of 2538649818 is about 1364.1671883225.

The spelling of 2538649818 in words is "two billion, five hundred thirty-eight million, six hundred forty-nine thousand, eight hundred eighteen".