37221759649 has 2 divisors, whose sum is σ = 37221759650. Its totient is φ = 37221759648.

The previous prime is 37221759647. The next prime is 37221759689. The reversal of 37221759649 is 94695712273.

37221759649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37125582400 + 96177249 = 192680^2 + 9807^2 .

It is a cyclic number.

It is not a de Polignac number, because 37221759649 - 2¹ = 37221759647 is a prime.

Together with 37221759647, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 37221759649.

It is not a weakly prime, because it can be changed into another prime (37221759647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18610879824 + 18610879825.

It is an arithmetic number, because the mean of its divisors is an integer number (18610879825).

Almost surely, 2^37221759649 is an apocalyptic number.

It is an amenable number.

37221759649 is a deficient number, since it is larger than the sum of its proper divisors (1).

37221759649 is an equidigital number, since it uses as much as digits as its factorization.

37221759649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5715360, while the sum is 55.

The spelling of 37221759649 in words is "thirty-seven billion, two hundred twenty-one million, seven hundred fifty-nine thousand, six hundred forty-nine".