620136626009 has 2 divisors, whose sum is σ = 620136626010. Its totient is φ = 620136626008.

The previous prime is 620136625961. The next prime is 620136626047. The reversal of 620136626009 is 900626631026.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 569123886409 + 51012739600 = 754403^2 + 225860^2 .

It is a cyclic number.

It is not a de Polignac number, because 620136626009 - 2²⁰ = 620135577433 is a prime.

It is not a weakly prime, because it can be changed into another prime (620136626059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310068313004 + 310068313005.

It is an arithmetic number, because the mean of its divisors is an integer number (310068313005).

Almost surely, 2^620136626009 is an apocalyptic number.

It is an amenable number.

620136626009 is a deficient number, since it is larger than the sum of its proper divisors (1).

620136626009 is an equidigital number, since it uses as much as digits as its factorization.

620136626009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 41.

The spelling of 620136626009 in words is "six hundred twenty billion, one hundred thirty-six million, six hundred twenty-six thousand, nine".