2118530025538 has 4 divisors (see below), whose sum is σ = 3177795038310. Its totient is φ = 1059265012768.

The previous prime is 2118530025511. The next prime is 2118530025589. The reversal of 2118530025538 is 8355200358112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2047237287489 + 71292738049 = 1430817^2 + 267007^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2118530025494 and 2118530025503.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 529632506383 + ... + 529632506386.

Almost surely, 2^{2118530025538} is an apocalyptic number.

2118530025538 is a deficient number, since it is larger than the sum of its proper divisors (1059265012772).

2118530025538 is a wasteful number, since it uses less digits than its factorization.

2118530025538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059265012771.

The product of its (nonzero) digits is 288000, while the sum is 43.

The spelling of 2118530025538 in words is "two trillion, one hundred eighteen billion, five hundred thirty million, twenty-five thousand, five hundred thirty-eight".