63510126521 has 2 divisors, whose sum is σ = 63510126522. Its totient is φ = 63510126520.

The previous prime is 63510126479. The next prime is 63510126593. The reversal of 63510126521 is 12562101536.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58498194496 + 5011932025 = 241864^2 + 70795^2 .

It is a cyclic number.

It is not a de Polignac number, because 63510126521 - 2¹⁴ = 63510110137 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (63510126221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31755063260 + 31755063261.

It is an arithmetic number, because the mean of its divisors is an integer number (31755063261).

Almost surely, 2^63510126521 is an apocalyptic number.

It is an amenable number.

63510126521 is a deficient number, since it is larger than the sum of its proper divisors (1).

63510126521 is an equidigital number, since it uses as much as digits as its factorization.

63510126521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 32.

The spelling of 63510126521 in words is "sixty-three billion, five hundred ten million, one hundred twenty-six thousand, five hundred twenty-one".