37221766649 has 2 divisors, whose sum is σ = 37221766650. Its totient is φ = 37221766648.

The previous prime is 37221766609. The next prime is 37221766651. The reversal of 37221766649 is 94666712273.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22223355625 + 14998411024 = 149075^2 + 122468^2 .

It is a cyclic number.

It is not a de Polignac number, because 37221766649 - 2¹² = 37221762553 is a prime.

Together with 37221766651, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 37221766649.

It is not a weakly prime, because it can be changed into another prime (37221766609) 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, 18610883324 + 18610883325.

It is an arithmetic number, because the mean of its divisors is an integer number (18610883325).

Almost surely, 2^37221766649 is an apocalyptic number.

It is an amenable number.

37221766649 is a deficient number, since it is larger than the sum of its proper divisors (1).

37221766649 is an equidigital number, since it uses as much as digits as its factorization.

37221766649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4572288, while the sum is 53.

The spelling of 37221766649 in words is "thirty-seven billion, two hundred twenty-one million, seven hundred sixty-six thousand, six hundred forty-nine".