1188409580164 has 27 divisors (see below), whose sum is σ = 2209318202917. Its totient is φ = 559234124864.

The previous prime is 1188409580087. The next prime is 1188409580173. The reversal of 1188409580164 is 4610859048811.

The square root of 1188409580164 is 1090142.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 925232372100 + 263177208064 = 961890^2 + 513008^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 37048797 + ... + 37080859.

Almost surely, 2^{1188409580164} is an apocalyptic number.

1188409580164 is the 1090142-nd square number.

It is an amenable number.

1188409580164 is a deficient number, since it is larger than the sum of its proper divisors (1020908622753).

1188409580164 is an frugal number, since it uses more digits than its factorization.

1188409580164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64164 (or 32082 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 55.

The spelling of 1188409580164 in words is "one trillion, one hundred eighty-eight billion, four hundred nine million, five hundred eighty thousand, one hundred sixty-four".