37125769721 has 2 divisors, whose sum is σ = 37125769722. Its totient is φ = 37125769720.

The previous prime is 37125769711. The next prime is 37125769757. The reversal of 37125769721 is 12796752173.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25459393600 + 11666376121 = 159560^2 + 108011^2 .

It is an emirp because it is prime and its reverse (12796752173) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 37125769721 - 2¹⁴ = 37125753337 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 37125769721.

It is not a weakly prime, because it can be changed into another prime (37125769711) 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, 18562884860 + 18562884861.

It is an arithmetic number, because the mean of its divisors is an integer number (18562884861).

Almost surely, 2^37125769721 is an apocalyptic number.

It is an amenable number.

37125769721 is a deficient number, since it is larger than the sum of its proper divisors (1).

37125769721 is an equidigital number, since it uses as much as digits as its factorization.

37125769721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1111320, while the sum is 50.

The spelling of 37125769721 in words is "thirty-seven billion, one hundred twenty-five million, seven hundred sixty-nine thousand, seven hundred twenty-one".