161456738 has 8 divisors (see below), whose sum is σ = 242546988. Its totient is φ = 80607744.

The previous prime is 161456731. The next prime is 161456741. The reversal of 161456738 is 837654161.

161456738 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 157076089 + 4380649 = 12533^2 + 2093^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 161456695 and 161456704.

It is not an unprimeable number, because it can be changed into a prime (161456731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58631 + ... + 61322.

Almost surely, 2^161456738 is an apocalyptic number.

161456738 is a deficient number, since it is larger than the sum of its proper divisors (81090250).

161456738 is a wasteful number, since it uses less digits than its factorization.

161456738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120628.

The product of its digits is 120960, while the sum is 41.

The square root of 161456738 is about 12706.5627925100. The cubic root of 161456738 is about 544.5261296322.

The spelling of 161456738 in words is "one hundred sixty-one million, four hundred fifty-six thousand, seven hundred thirty-eight".