209044241537 has 2 divisors, whose sum is σ = 209044241538. Its totient is φ = 209044241536.

The previous prime is 209044241533. The next prime is 209044241591. The reversal of 209044241537 is 735142440902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 206269480561 + 2774760976 = 454169^2 + 52676^2 .

It is a cyclic number.

It is not a de Polignac number, because 209044241537 - 2² = 209044241533 is a prime.

It is a super-2 number, since 2×209044241537² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 209044241494 and 209044241503.

It is not a weakly prime, because it can be changed into another prime (209044241533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104522120768 + 104522120769.

It is an arithmetic number, because the mean of its divisors is an integer number (104522120769).

Almost surely, 2^209044241537 is an apocalyptic number.

It is an amenable number.

209044241537 is a deficient number, since it is larger than the sum of its proper divisors (1).

209044241537 is an equidigital number, since it uses as much as digits as its factorization.

209044241537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 209044241537 in words is "two hundred nine billion, forty-four million, two hundred forty-one thousand, five hundred thirty-seven".