161456403 has 8 divisors (see below), whose sum is σ = 217494928. Its totient is φ = 106527744.

The previous prime is 161456387. The next prime is 161456411. The reversal of 161456403 is 304654161.

161456403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161456403 - 2⁴ = 161456387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161456453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277126 + ... + 277707.

It is an arithmetic number, because the mean of its divisors is an integer number (27186866).

Almost surely, 2^161456403 is an apocalyptic number.

161456403 is a deficient number, since it is larger than the sum of its proper divisors (56038525).

161456403 is an equidigital number, since it uses as much as digits as its factorization.

161456403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554933.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 161456403 is about 12706.5496103388. The cubic root of 161456403 is about 544.5257530270.

The spelling of 161456403 in words is "one hundred sixty-one million, four hundred fifty-six thousand, four hundred three".