1188388639090 has 48 divisors (see below), whose sum is σ = 2210806390104. Its totient is φ = 459921991680.

The previous prime is 1188388639043. The next prime is 1188388639133. The reversal of 1188388639090 is 909368838811.

It can be written as a sum of positive squares in 4 ways, for example, as 871080622489 + 317308016601 = 933317^2 + 563301^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57197944 + ... + 57218716.

Almost surely, 2^{1188388639090} is an apocalyptic number.

1188388639090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1188388639090 is a deficient number, since it is larger than the sum of its proper divisors (1022417751014).

1188388639090 is a wasteful number, since it uses less digits than its factorization.

1188388639090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26795 (or 26764 counting only the distinct ones).

The product of its (nonzero) digits is 17915904, while the sum is 64.

The spelling of 1188388639090 in words is "one trillion, one hundred eighty-eight billion, three hundred eighty-eight million, six hundred thirty-nine thousand, ninety".