40202000261 has 2 divisors, whose sum is σ = 40202000262. Its totient is φ = 40202000260.

The previous prime is 40202000233. The next prime is 40202000263. The reversal of 40202000261 is 16200020204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33697577761 + 6504422500 = 183569^2 + 80650^2 .

It is a cyclic number.

It is not a de Polignac number, because 40202000261 - 2¹⁰ = 40201999237 is a prime.

Together with 40202000263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40202000263) 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, 20101000130 + 20101000131.

It is an arithmetic number, because the mean of its divisors is an integer number (20101000131).

Almost surely, 2^40202000261 is an apocalyptic number.

It is an amenable number.

40202000261 is a deficient number, since it is larger than the sum of its proper divisors (1).

40202000261 is an equidigital number, since it uses as much as digits as its factorization.

40202000261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 40202000261 its reverse (16200020204), we get a palindrome (56402020465).

The spelling of 40202000261 in words is "forty billion, two hundred two million, two hundred sixty-one", and thus it is an aban number.