21626510055463 has 2 divisors, whose sum is σ = 21626510055464. Its totient is φ = 21626510055462.

The previous prime is 21626510055361. The next prime is 21626510055581. The reversal of 21626510055463 is 36455001562612.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21626510055463 is a prime.

It is a super-2 number, since 2×21626510055463² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21626510035463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10813255027731 + 10813255027732.

It is an arithmetic number, because the mean of its divisors is an integer number (10813255027732).

Almost surely, 2^{21626510055463} is an apocalyptic number.

21626510055463 is a deficient number, since it is larger than the sum of its proper divisors (1).

21626510055463 is an equidigital number, since it uses as much as digits as its factorization.

21626510055463 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296000, while the sum is 46.

The spelling of 21626510055463 in words is "twenty-one trillion, six hundred twenty-six billion, five hundred ten million, fifty-five thousand, four hundred sixty-three".