4025643637 has 2 divisors, whose sum is σ = 4025643638. Its totient is φ = 4025643636.

The previous prime is 4025643607. The next prime is 4025643641. The reversal of 4025643637 is 7363465204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3424707441 + 600936196 = 58521^2 + 24514^2 .

It is a cyclic number.

It is not a de Polignac number, because 4025643637 - 2¹¹ = 4025641589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4025643637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4025643607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2012821818 + 2012821819.

It is an arithmetic number, because the mean of its divisors is an integer number (2012821819).

Almost surely, 2^4025643637 is an apocalyptic number.

It is an amenable number.

4025643637 is a deficient number, since it is larger than the sum of its proper divisors (1).

4025643637 is an equidigital number, since it uses as much as digits as its factorization.

4025643637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 40.

The square root of 4025643637 is about 63447.9600696508. The cubic root of 4025643637 is about 1590.7860566173.

The spelling of 4025643637 in words is "four billion, twenty-five million, six hundred forty-three thousand, six hundred thirty-seven".