4188400025 has 6 divisors (see below), whose sum is σ = 5193616062. Its totient is φ = 3350720000.

The previous prime is 4188400009. The next prime is 4188400063. The reversal of 4188400025 is 5200048814.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1082344201 + 3106055824 = 32899^2 + 55732^2 .

It is not a de Polignac number, because 4188400025 - 2⁴ = 4188400009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4188399964 and 4188400000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 83767976 + ... + 83768025.

It is an arithmetic number, because the mean of its divisors is an integer number (865602677).

Almost surely, 2^4188400025 is an apocalyptic number.

It is an amenable number.

4188400025 is a deficient number, since it is larger than the sum of its proper divisors (1005216037).

4188400025 is a wasteful number, since it uses less digits than its factorization.

4188400025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167536011 (or 167536006 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 32.

The square root of 4188400025 is about 64717.8493539456. The cubic root of 4188400025 is about 1611.9419008845.

Adding to 4188400025 its reverse (5200048814), we get a palindrome (9388448839).

The spelling of 4188400025 in words is "four billion, one hundred eighty-eight million, four hundred thousand, twenty-five".