161264583 has 12 divisors (see below), whose sum is σ = 233211888. Its totient is φ = 107383200.

The previous prime is 161264581. The next prime is 161264599. The reversal of 161264583 is 385462161.

It is a happy number.

161264583 is a `hidden beast` number, since 1 + 6 + 1 + 2 + 645 + 8 + 3 = 666.

It is not a de Polignac number, because 161264583 - 2¹ = 161264581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161264581) 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, 2118 + ... + 18083.

It is an arithmetic number, because the mean of its divisors is an integer number (19434324).

Almost surely, 2^161264583 is an apocalyptic number.

161264583 is a deficient number, since it is larger than the sum of its proper divisors (71947305).

161264583 is a wasteful number, since it uses less digits than its factorization.

161264583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21094 (or 21091 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 161264583 is about 12698.9992912828. Note that the first 3 decimals coincide. The cubic root of 161264583 is about 544.3100243638.

The spelling of 161264583 in words is "one hundred sixty-one million, two hundred sixty-four thousand, five hundred eighty-three".