501056109989 has 2 divisors, whose sum is σ = 501056109990. Its totient is φ = 501056109988.

The previous prime is 501056109973. The next prime is 501056110033. The reversal of 501056109989 is 989901650105.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 471460756900 + 29595353089 = 686630^2 + 172033^2 .

It is a cyclic number.

It is not a de Polignac number, because 501056109989 - 2⁴ = 501056109973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 501056109989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (501056109919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250528054994 + 250528054995.

It is an arithmetic number, because the mean of its divisors is an integer number (250528054995).

Almost surely, 2^501056109989 is an apocalyptic number.

It is an amenable number.

501056109989 is a deficient number, since it is larger than the sum of its proper divisors (1).

501056109989 is an equidigital number, since it uses as much as digits as its factorization.

501056109989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 874800, while the sum is 53.

The spelling of 501056109989 in words is "five hundred one billion, fifty-six million, one hundred nine thousand, nine hundred eighty-nine".