161605458934785 has 32 divisors (see below), whose sum is σ = 294305876444160. Its totient is φ = 84087393264000.

The previous prime is 161605458934781. The next prime is 161605458934789. The reversal of 161605458934785 is 587439854506161.

161605458934785 is a `hidden beast` number, since 1 + 6 + 1 + 6 + 0 + 5 + 4 + 589 + 34 + 7 + 8 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (161605458934781) and next prime (161605458934789).

It is not a de Polignac number, because 161605458934785 - 2² = 161605458934781 is a prime.

It is a super-2 number, since 2×161605458934785² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161605458934781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14598500241 + ... + 14598511310.

It is an arithmetic number, because the mean of its divisors is an integer number (9197058638880).

Almost surely, 2^{161605458934785} is an apocalyptic number.

161605458934785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161605458934785 is a deficient number, since it is larger than the sum of its proper divisors (132700417509375).

161605458934785 is a wasteful number, since it uses less digits than its factorization.

161605458934785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29197011606 (or 29197011600 counting only the distinct ones).

The product of its (nonzero) digits is 870912000, while the sum is 72.

The spelling of 161605458934785 in words is "one hundred sixty-one trillion, six hundred five billion, four hundred fifty-eight million, nine hundred thirty-four thousand, seven hundred eighty-five".