37749463657 has 2 divisors, whose sum is σ = 37749463658. Its totient is φ = 37749463656.

The previous prime is 37749463651. The next prime is 37749463729. The reversal of 37749463657 is 75636494773.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30786562521 + 6962901136 = 175461^2 + 83444^2 .

It is a cyclic number.

It is not a de Polignac number, because 37749463657 - 2¹¹ = 37749461609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 37749463595 and 37749463604.

It is not a weakly prime, because it can be changed into another prime (37749463651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18874731828 + 18874731829.

It is an arithmetic number, because the mean of its divisors is an integer number (18874731829).

Almost surely, 2^37749463657 is an apocalyptic number.

It is an amenable number.

37749463657 is a deficient number, since it is larger than the sum of its proper divisors (1).

37749463657 is an equidigital number, since it uses as much as digits as its factorization.

37749463657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80015040, while the sum is 61.

The spelling of 37749463657 in words is "thirty-seven billion, seven hundred forty-nine million, four hundred sixty-three thousand, six hundred fifty-seven".