1188120536538 has 64 divisors (see below), whose sum is σ = 2562963524352. Its totient is φ = 365013941760.

The previous prime is 1188120536521. The next prime is 1188120536543. The reversal of 1188120536538 is 8356350218811.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 164169456 + ... + 164176692.

It is an arithmetic number, because the mean of its divisors is an integer number (40046305068).

Almost surely, 2^{1188120536538} is an apocalyptic number.

1188120536538 is an abundant number, since it is smaller than the sum of its proper divisors (1374842987814).

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

1188120536538 is a wasteful number, since it uses less digits than its factorization.

1188120536538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10199.

The product of its (nonzero) digits is 1382400, while the sum is 51.

The spelling of 1188120536538 in words is "one trillion, one hundred eighty-eight billion, one hundred twenty million, five hundred thirty-six thousand, five hundred thirty-eight".