11577997989 has 18 divisors (see below), whose sum is σ = 16754692370. Its totient is φ = 7704415296.

The previous prime is 11577997969. The next prime is 11577997993. The reversal of 11577997989 is 98979977511.

It can be written as a sum of positive squares in 3 ways, for example, as 270865764 + 11307132225 = 16458^2 + 106335^2 .

It is not a de Polignac number, because 11577997989 - 2⁸ = 11577997733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11577997969) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 10553689 + ... + 10554785.

Almost surely, 2^11577997989 is an apocalyptic number.

It is an amenable number.

11577997989 is a deficient number, since it is larger than the sum of its proper divisors (5176694381).

11577997989 is an equidigital number, since it uses as much as digits as its factorization.

11577997989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3269 (or 2169 counting only the distinct ones).

The product of its digits is 90016920, while the sum is 72.

The spelling of 11577997989 in words is "eleven billion, five hundred seventy-seven million, nine hundred ninety-seven thousand, nine hundred eighty-nine".