125555432005 has 4 divisors (see below), whose sum is σ = 150666518412. Its totient is φ = 100444345600.

The previous prime is 125555432003. The next prime is 125555432017. The reversal of 125555432005 is 500234555521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55038098404 + 70517333601 = 234602^2 + 265551^2 .

It is not a de Polignac number, because 125555432005 - 2¹ = 125555432003 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 (125555432003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12555543196 + ... + 12555543205.

It is an arithmetic number, because the mean of its divisors is an integer number (37666629603).

Almost surely, 2^125555432005 is an apocalyptic number.

It is an amenable number.

125555432005 is a deficient number, since it is larger than the sum of its proper divisors (25111086407).

125555432005 is an equidigital number, since it uses as much as digits as its factorization.

125555432005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25111086406.

The product of its (nonzero) digits is 150000, while the sum is 37.

Adding to 125555432005 its reverse (500234555521), we get a palindrome (625789987526).

The spelling of 125555432005 in words is "one hundred twenty-five billion, five hundred fifty-five million, four hundred thirty-two thousand, five".