165956454 has 96 divisors (see below), whose sum is σ = 395126784. Its totient is φ = 50181120.

The previous prime is 165956447. The next prime is 165956467. The reversal of 165956454 is 454659561.

165956454 is a `hidden beast` number, since 1 + 6 + 595 + 6 + 4 + 54 = 666.

165956454 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 859782 + ... + 859974.

It is an arithmetic number, because the mean of its divisors is an integer number (4115904).

Almost surely, 2^165956454 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165956454, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197563392).

165956454 is an abundant number, since it is smaller than the sum of its proper divisors (229170330).

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

165956454 is a wasteful number, since it uses less digits than its factorization.

165956454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322 (or 319 counting only the distinct ones).

The product of its digits is 648000, while the sum is 45.

The square root of 165956454 is about 12882.4087033443. The cubic root of 165956454 is about 549.5384049950.

The spelling of 165956454 in words is "one hundred sixty-five million, nine hundred fifty-six thousand, four hundred fifty-four".