161782647 has 16 divisors (see below), whose sum is σ = 232931328. Its totient is φ = 99289440.

The previous prime is 161782627. The next prime is 161782657. The reversal of 161782647 is 746287161.

It is not a de Polignac number, because 161782647 - 2⁷ = 161782519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161782599 and 161782608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161782627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9522 + ... + 20352.

It is an arithmetic number, because the mean of its divisors is an integer number (14558208).

Almost surely, 2^161782647 is an apocalyptic number.

161782647 is a deficient number, since it is larger than the sum of its proper divisors (71148681).

161782647 is a wasteful number, since it uses less digits than its factorization.

161782647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11230.

The product of its digits is 112896, while the sum is 42.

The square root of 161782647 is about 12719.3807632290. The cubic root of 161782647 is about 544.8922683559.

The spelling of 161782647 in words is "one hundred sixty-one million, seven hundred eighty-two thousand, six hundred forty-seven".