4835891957621 has 2 divisors, whose sum is σ = 4835891957622. Its totient is φ = 4835891957620.

The previous prime is 4835891957453. The next prime is 4835891957623. The reversal of 4835891957621 is 1267591985384.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4812819866596 + 23072091025 = 2193814^2 + 151895^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4835891957621 is a prime.

Together with 4835891957623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4835891957623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2417945978810 + 2417945978811.

It is an arithmetic number, because the mean of its divisors is an integer number (2417945978811).

Almost surely, 2^{4835891957621} is an apocalyptic number.

It is an amenable number.

4835891957621 is a deficient number, since it is larger than the sum of its proper divisors (1).

4835891957621 is an equidigital number, since it uses as much as digits as its factorization.

4835891957621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 130636800, while the sum is 68.

The spelling of 4835891957621 in words is "four trillion, eight hundred thirty-five billion, eight hundred ninety-one million, nine hundred fifty-seven thousand, six hundred twenty-one".