161447313717 has 12 divisors (see below), whose sum is σ = 236486206944. Its totient is φ = 106115604840.

The previous prime is 161447313697. The next prime is 161447313737. The reversal of 161447313717 is 717313744161.

161447313717 is a `hidden beast` number, since 1 + 61 + 447 + 3 + 137 + 17 = 666.

It is an interprime number because it is at equal distance from previous prime (161447313697) and next prime (161447313737).

It is not a de Polignac number, because 161447313717 - 2¹⁸ = 161447051573 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161447313737) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 126327463 + ... + 126328740.

It is an arithmetic number, because the mean of its divisors is an integer number (19707183912).

Almost surely, 2^161447313717 is an apocalyptic number.

It is an amenable number.

161447313717 is a deficient number, since it is larger than the sum of its proper divisors (75038893227).

161447313717 is a wasteful number, since it uses less digits than its factorization.

161447313717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252656280 (or 252656277 counting only the distinct ones).

The product of its digits is 296352, while the sum is 45.

The spelling of 161447313717 in words is "one hundred sixty-one billion, four hundred forty-seven million, three hundred thirteen thousand, seven hundred seventeen".