2638172041 has 2 divisors, whose sum is σ = 2638172042. Its totient is φ = 2638172040.

The previous prime is 2638172003. The next prime is 2638172093. The reversal of 2638172041 is 1402718362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1468805625 + 1169366416 = 38325^2 + 34196^2 .

It is a cyclic number.

It is not a de Polignac number, because 2638172041 - 2¹³ = 2638163849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2638171988 and 2638172006.

It is not a weakly prime, because it can be changed into another prime (2638172741) by changing a digit.

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 as a sum of consecutive naturals, namely, 1319086020 + 1319086021.

It is an arithmetic number, because the mean of its divisors is an integer number (1319086021).

Almost surely, 2^2638172041 is an apocalyptic number.

It is an amenable number.

2638172041 is a deficient number, since it is larger than the sum of its proper divisors (1).

2638172041 is an equidigital number, since it uses as much as digits as its factorization.

2638172041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 2638172041 is about 51363.1389325068. The cubic root of 2638172041 is about 1381.7655832004.

The spelling of 2638172041 in words is "two billion, six hundred thirty-eight million, one hundred seventy-two thousand, forty-one".