1475309317661 has 2 divisors, whose sum is σ = 1475309317662. Its totient is φ = 1475309317660.

The previous prime is 1475309317627. The next prime is 1475309317723. The reversal of 1475309317661 is 1667139035741.

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., 1160370612025 + 314938705636 = 1077205^2 + 561194^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1475309317661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1475309317861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 737654658830 + 737654658831.

It is an arithmetic number, because the mean of its divisors is an integer number (737654658831).

Almost surely, 2^{1475309317661} is an apocalyptic number.

It is an amenable number.

1475309317661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1475309317661 is an equidigital number, since it uses as much as digits as its factorization.

1475309317661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2857680, while the sum is 53.

The spelling of 1475309317661 in words is "one trillion, four hundred seventy-five billion, three hundred nine million, three hundred seventeen thousand, six hundred sixty-one".