5263157368421 has 2 divisors, whose sum is σ = 5263157368422. Its totient is φ = 5263157368420.

The previous prime is 5263157368379. The next prime is 5263157368459. The reversal of 5263157368421 is 1248637513625.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2657470530625 + 2605686837796 = 1630175^2 + 1614214^2 .

It is a cyclic number.

It is not a de Polignac number, because 5263157368421 - 2¹⁰ = 5263157367397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5263157361421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2631578684210 + 2631578684211.

It is an arithmetic number, because the mean of its divisors is an integer number (2631578684211).

Almost surely, 2^{5263157368421} is an apocalyptic number.

It is an amenable number.

5263157368421 is a deficient number, since it is larger than the sum of its proper divisors (1).

5263157368421 is an equidigital number, since it uses as much as digits as its factorization.

5263157368421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7257600, while the sum is 53.

The spelling of 5263157368421 in words is "five trillion, two hundred sixty-three billion, one hundred fifty-seven million, three hundred sixty-eight thousand, four hundred twenty-one".