161286775 has 24 divisors (see below), whose sum is σ = 216329904. Its totient is φ = 118579200.

The previous prime is 161286767. The next prime is 161286793. The reversal of 161286775 is 577682161.

It is not a de Polignac number, because 161286775 - 2³ = 161286767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82560 + ... + 84490.

It is an arithmetic number, because the mean of its divisors is an integer number (9013746).

Almost surely, 2^161286775 is an apocalyptic number.

161286775 is a deficient number, since it is larger than the sum of its proper divisors (55043129).

161286775 is a wasteful number, since it uses less digits than its factorization.

161286775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2211 (or 2206 counting only the distinct ones).

The product of its digits is 141120, while the sum is 43.

The square root of 161286775 is about 12699.8730308614. The cubic root of 161286775 is about 544.3349911477.

The spelling of 161286775 in words is "one hundred sixty-one million, two hundred eighty-six thousand, seven hundred seventy-five".