1189920412989 has 224 divisors, whose sum is σ = 2278280678400. Its totient is φ = 615801463200.

The previous prime is 1189920412969. The next prime is 1189920413023. The reversal of 1189920412989 is 9892140299811.

1189920412989 is a `hidden beast` number, since 118 + 9 + 9 + 20 + 412 + 9 + 89 = 666.

It is not a de Polignac number, because 1189920412989 - 2¹² = 1189920408893 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1189920412909) by changing a digit.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 910420474 + ... + 910421780.

Almost surely, 2^{1189920412989} is an apocalyptic number.

It is an amenable number.

1189920412989 is a deficient number, since it is larger than the sum of its proper divisors (1088360265411).

1189920412989 is an equidigital number, since it uses as much as digits as its factorization.

1189920412989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688 (or 1659 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 63.

The spelling of 1189920412989 in words is "one trillion, one hundred eighty-nine billion, nine hundred twenty million, four hundred twelve thousand, nine hundred eighty-nine".