125004440009 has 2 divisors, whose sum is σ = 125004440010. Its totient is φ = 125004440008.

The previous prime is 125004439991. The next prime is 125004440047. The reversal of 125004440009 is 900044400521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123532566784 + 1471873225 = 351472^2 + 38365^2 .

It is a cyclic number.

It is not a de Polignac number, because 125004440009 - 2²⁰ = 125003391433 is a prime.

It is a super-2 number, since 2×125004440009² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (125004440089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62502220004 + 62502220005.

It is an arithmetic number, because the mean of its divisors is an integer number (62502220005).

Almost surely, 2^125004440009 is an apocalyptic number.

It is an amenable number.

125004440009 is a deficient number, since it is larger than the sum of its proper divisors (1).

125004440009 is an equidigital number, since it uses as much as digits as its factorization.

125004440009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 29.

The spelling of 125004440009 in words is "one hundred twenty-five billion, four million, four hundred forty thousand, nine".