4638390971651 has 2 divisors, whose sum is σ = 4638390971652. Its totient is φ = 4638390971650.

The previous prime is 4638390971519. The next prime is 4638390971681. The reversal of 4638390971651 is 1561790938364.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4638390971651 - 2¹⁰ = 4638390970627 is a prime.

It is not a weakly prime, because it can be changed into another prime (4638390971681) 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 as a sum of consecutive naturals, namely, 2319195485825 + 2319195485826.

It is an arithmetic number, because the mean of its divisors is an integer number (2319195485826).

Almost surely, 2^{4638390971651} is an apocalyptic number.

4638390971651 is a deficient number, since it is larger than the sum of its proper divisors (1).

4638390971651 is an equidigital number, since it uses as much as digits as its factorization.

4638390971651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29393280, while the sum is 62.

The spelling of 4638390971651 in words is "four trillion, six hundred thirty-eight billion, three hundred ninety million, nine hundred seventy-one thousand, six hundred fifty-one".