5126533661 has 2 divisors, whose sum is σ = 5126533662. Its totient is φ = 5126533660.

The previous prime is 5126533619. The next prime is 5126533673. The reversal of 5126533661 is 1663356215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5092963225 + 33570436 = 71365^2 + 5794^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5126533661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5126533691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2563266830 + 2563266831.

It is an arithmetic number, because the mean of its divisors is an integer number (2563266831).

Almost surely, 2^5126533661 is an apocalyptic number.

It is an amenable number.

5126533661 is a deficient number, since it is larger than the sum of its proper divisors (1).

5126533661 is an equidigital number, since it uses as much as digits as its factorization.

5126533661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 38.

The square root of 5126533661 is about 71599.8160681995. The cubic root of 5126533661 is about 1724.2805834066.

Adding to 5126533661 its reverse (1663356215), we get a palindrome (6789889876).

The spelling of 5126533661 in words is "five billion, one hundred twenty-six million, five hundred thirty-three thousand, six hundred sixty-one".