161967455 has 32 divisors (see below), whose sum is σ = 216082944. Its totient is φ = 115790976.

The previous prime is 161967437. The next prime is 161967461. The reversal of 161967455 is 554769161.

It is a cyclic number.

It is not a de Polignac number, because 161967455 - 2⁶ = 161967391 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 31 ways as a sum of consecutive naturals, for example, 466592 + ... + 466938.

It is an arithmetic number, because the mean of its divisors is an integer number (6752592).

Almost surely, 2^161967455 is an apocalyptic number.

161967455 is a deficient number, since it is larger than the sum of its proper divisors (54115489).

161967455 is a wasteful number, since it uses less digits than its factorization.

161967455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575.

The product of its digits is 226800, while the sum is 44.

The square root of 161967455 is about 12726.6435087968. The cubic root of 161967455 is about 545.0996703494.

The spelling of 161967455 in words is "one hundred sixty-one million, nine hundred sixty-seven thousand, four hundred fifty-five".