37478217409 has 2 divisors, whose sum is σ = 37478217410. Its totient is φ = 37478217408.

The previous prime is 37478217397. The next prime is 37478217437. The reversal of 37478217409 is 90471287473.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32932086784 + 4546130625 = 181472^2 + 67425^2 .

It is a cyclic number.

It is not a de Polignac number, because 37478217409 - 2¹¹ = 37478215361 is a prime.

It is not a weakly prime, because it can be changed into another prime (37478217509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18739108704 + 18739108705.

It is an arithmetic number, because the mean of its divisors is an integer number (18739108705).

Almost surely, 2^37478217409 is an apocalyptic number.

It is an amenable number.

37478217409 is a deficient number, since it is larger than the sum of its proper divisors (1).

37478217409 is an equidigital number, since it uses as much as digits as its factorization.

37478217409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2370816, while the sum is 52.

The spelling of 37478217409 in words is "thirty-seven billion, four hundred seventy-eight million, two hundred seventeen thousand, four hundred nine".