4138447945 has 4 divisors (see below), whose sum is σ = 4966137540. Its totient is φ = 3310758352.

The previous prime is 4138447927. The next prime is 4138448003. The reversal of 4138447945 is 5497448314.

It is a happy number.

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 2889815049 + 1248632896 = 53757^2 + 35336^2 .

It is a cyclic number.

It is not a de Polignac number, because 4138447945 - 2⁹ = 4138447433 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 413844790 + ... + 413844799.

It is an arithmetic number, because the mean of its divisors is an integer number (1241534385).

Almost surely, 2^4138447945 is an apocalyptic number.

It is an amenable number.

4138447945 is a deficient number, since it is larger than the sum of its proper divisors (827689595).

4138447945 is an equidigital number, since it uses as much as digits as its factorization.

4138447945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827689594.

The product of its digits is 1935360, while the sum is 49.

The square root of 4138447945 is about 64330.7698150737. The cubic root of 4138447945 is about 1605.5080924859.

The spelling of 4138447945 in words is "four billion, one hundred thirty-eight million, four hundred forty-seven thousand, nine hundred forty-five".