10420555669 has 2 divisors, whose sum is σ = 10420555670. Its totient is φ = 10420555668.

The previous prime is 10420555661. The next prime is 10420555687. The reversal of 10420555669 is 96655502401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10026016900 + 394538769 = 100130^2 + 19863^2 .

It is an emirp because it is prime and its reverse (96655502401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10420555669 - 2³ = 10420555661 is a prime.

It is a super-2 number, since 2×10420555669² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10420555661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5210277834 + 5210277835.

It is an arithmetic number, because the mean of its divisors is an integer number (5210277835).

Almost surely, 2^10420555669 is an apocalyptic number.

It is an amenable number.

10420555669 is a deficient number, since it is larger than the sum of its proper divisors (1).

10420555669 is an equidigital number, since it uses as much as digits as its factorization.

10420555669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324000, while the sum is 43.

The spelling of 10420555669 in words is "ten billion, four hundred twenty million, five hundred fifty-five thousand, six hundred sixty-nine".