2505930138 has 12 divisors (see below), whose sum is σ = 5429515338. Its totient is φ = 835310040.

The previous prime is 2505930137. The next prime is 2505930143. The reversal of 2505930138 is 8310395052.

2505930138 is a `hidden beast` number, since 2 + 50 + 593 + 0 + 13 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2117564289 + 388365849 = 46017^2 + 19707^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2505930137) 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, 69609153 + ... + 69609188.

Almost surely, 2^2505930138 is an apocalyptic number.

2505930138 is an abundant number, since it is smaller than the sum of its proper divisors (2923585200).

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

2505930138 is a wasteful number, since it uses less digits than its factorization.

2505930138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139218349 (or 139218346 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 2505930138 is about 50059.2662551101. The cubic root of 2505930138 is about 1358.2810856472.

The spelling of 2505930138 in words is "two billion, five hundred five million, nine hundred thirty thousand, one hundred thirty-eight".