37643544361 has 2 divisors, whose sum is σ = 37643544362. Its totient is φ = 37643544360.

The previous prime is 37643544353. The next prime is 37643544371. The reversal of 37643544361 is 16344534673.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34069776400 + 3573767961 = 184580^2 + 59781^2 .

It is a cyclic number.

It is not a de Polignac number, because 37643544361 - 2³ = 37643544353 is a prime.

It is not a weakly prime, because it can be changed into another prime (37643544331) 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, 18821772180 + 18821772181.

It is an arithmetic number, because the mean of its divisors is an integer number (18821772181).

Almost surely, 2^37643544361 is an apocalyptic number.

It is an amenable number.

37643544361 is a deficient number, since it is larger than the sum of its proper divisors (1).

37643544361 is an equidigital number, since it uses as much as digits as its factorization.

37643544361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 46.

The spelling of 37643544361 in words is "thirty-seven billion, six hundred forty-three million, five hundred forty-four thousand, three hundred sixty-one".