40101020989 has 2 divisors, whose sum is σ = 40101020990. Its totient is φ = 40101020988.

The previous prime is 40101020987. The next prime is 40101021073. The reversal of 40101020989 is 98902010104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39174305625 + 926715364 = 197925^2 + 30442^2 .

It is a cyclic number.

It is not a de Polignac number, because 40101020989 - 2¹ = 40101020987 is a prime.

Together with 40101020987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40101020987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20050510494 + 20050510495.

It is an arithmetic number, because the mean of its divisors is an integer number (20050510495).

Almost surely, 2^40101020989 is an apocalyptic number.

It is an amenable number.

40101020989 is a deficient number, since it is larger than the sum of its proper divisors (1).

40101020989 is an equidigital number, since it uses as much as digits as its factorization.

40101020989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 34.

The spelling of 40101020989 in words is "forty billion, one hundred one million, twenty thousand, nine hundred eighty-nine".