35871661409 has 2 divisors, whose sum is σ = 35871661410. Its totient is φ = 35871661408.

The previous prime is 35871661379. The next prime is 35871661417. The reversal of 35871661409 is 90416617853.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35289501025 + 582160384 = 187855^2 + 24128^2 .

It is a cyclic number.

It is not a de Polignac number, because 35871661409 - 2¹⁶ = 35871595873 is a prime.

It is not a weakly prime, because it can be changed into another prime (35871661489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17935830704 + 17935830705.

It is an arithmetic number, because the mean of its divisors is an integer number (17935830705).

Almost surely, 2^35871661409 is an apocalyptic number.

It is an amenable number.

35871661409 is a deficient number, since it is larger than the sum of its proper divisors (1).

35871661409 is an equidigital number, since it uses as much as digits as its factorization.

35871661409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 35871661409 in words is "thirty-five billion, eight hundred seventy-one million, six hundred sixty-one thousand, four hundred nine".