11925172489 has 2 divisors, whose sum is σ = 11925172490. Its totient is φ = 11925172488.

The previous prime is 11925172477. The next prime is 11925172537. The reversal of 11925172489 is 98427152911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7228400400 + 4696772089 = 85020^2 + 68533^2 .

It is a cyclic number.

It is not a de Polignac number, because 11925172489 - 2⁷ = 11925172361 is a prime.

It is not a weakly prime, because it can be changed into another prime (11925172439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5962586244 + 5962586245.

It is an arithmetic number, because the mean of its divisors is an integer number (5962586245).

Almost surely, 2^11925172489 is an apocalyptic number.

It is an amenable number.

11925172489 is a deficient number, since it is larger than the sum of its proper divisors (1).

11925172489 is an equidigital number, since it uses as much as digits as its factorization.

11925172489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 49.

The spelling of 11925172489 in words is "eleven billion, nine hundred twenty-five million, one hundred seventy-two thousand, four hundred eighty-nine".