1189215728488 has 8 divisors (see below), whose sum is σ = 2229779490930. Its totient is φ = 594607864240.

The previous prime is 1189215728473. The next prime is 1189215728497. The reversal of 1189215728488 is 8848275129811.

It can be written as a sum of positive squares in only one way, i.e., 1177220660004 + 11995068484 = 1084998^2 + 109522^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1189215728488² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74325983023 + ... + 74325983038.

Almost surely, 2^{1189215728488} is an apocalyptic number.

It is an amenable number.

1189215728488 is a deficient number, since it is larger than the sum of its proper divisors (1040563762442).

1189215728488 is a wasteful number, since it uses less digits than its factorization.

1189215728488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148651966067 (or 148651966063 counting only the distinct ones).

The product of its digits is 20643840, while the sum is 64.

The spelling of 1189215728488 in words is "one trillion, one hundred eighty-nine billion, two hundred fifteen million, seven hundred twenty-eight thousand, four hundred eighty-eight".