165461994 has 128 divisors (see below), whose sum is σ = 411264000. Its totient is φ = 49097664.

The previous prime is 165461987. The next prime is 165462001. The reversal of 165461994 is 499164561.

It is a happy number.

165461994 is a `hidden beast` number, since 1 + 6 + 546 + 19 + 94 = 666.

It is an interprime number because it is at equal distance from previous prime (165461987) and next prime (165462001).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1993477 + ... + 1993559.

It is an arithmetic number, because the mean of its divisors is an integer number (3213000).

Almost surely, 2^165461994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165461994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205632000).

165461994 is an abundant number, since it is smaller than the sum of its proper divisors (245802006).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165461994 is a wasteful number, since it uses less digits than its factorization.

165461994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209 (or 203 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 165461994 is about 12863.2031003168. The cubic root of 165461994 is about 548.9920868399.

The spelling of 165461994 in words is "one hundred sixty-five million, four hundred sixty-one thousand, nine hundred ninety-four".