161967454 has 12 divisors (see below), whose sum is σ = 267045912. Its totient is φ = 73621460.

The previous prime is 161967437. The next prime is 161967461. The reversal of 161967454 is 454769161.

It is a self number, because there is not a number n which added to its sum of digits gives 161967454.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 334402 + ... + 334885.

It is an arithmetic number, because the mean of its divisors is an integer number (22253826).

Almost surely, 2^161967454 is an apocalyptic number.

161967454 is a deficient number, since it is larger than the sum of its proper divisors (105078458).

161967454 is a wasteful number, since it uses less digits than its factorization.

161967454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669311 (or 669300 counting only the distinct ones).

The product of its digits is 181440, while the sum is 43.

The square root of 161967454 is about 12726.6434695092. The cubic root of 161967454 is about 545.0996692276.

The spelling of 161967454 in words is "one hundred sixty-one million, nine hundred sixty-seven thousand, four hundred fifty-four".