420617718629 has 2 divisors, whose sum is σ = 420617718630. Its totient is φ = 420617718628.

The previous prime is 420617718611. The next prime is 420617718649. The reversal of 420617718629 is 926817716024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 354054750625 + 66562968004 = 595025^2 + 257998^2 .

It is a cyclic number.

It is not a de Polignac number, because 420617718629 - 2⁸ = 420617718373 is a prime.

It is a super-2 number, since 2×420617718629² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420617718649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210308859314 + 210308859315.

It is an arithmetic number, because the mean of its divisors is an integer number (210308859315).

Almost surely, 2^420617718629 is an apocalyptic number.

It is an amenable number.

420617718629 is a deficient number, since it is larger than the sum of its proper divisors (1).

420617718629 is an equidigital number, since it uses as much as digits as its factorization.

420617718629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2032128, while the sum is 53.

The spelling of 420617718629 in words is "four hundred twenty billion, six hundred seventeen million, seven hundred eighteen thousand, six hundred twenty-nine".