161438467628 has 12 divisors (see below), whose sum is σ = 282544295712. Its totient is φ = 80711526000.

The previous prime is 161438467627. The next prime is 161438467649. The reversal of 161438467628 is 826764834161.

161438467628 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (161438467627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1879700 + ... + 1963707.

It is an arithmetic number, because the mean of its divisors is an integer number (23545357976).

Almost surely, 2^161438467628 is an apocalyptic number.

It is an amenable number.

161438467628 is a deficient number, since it is larger than the sum of its proper divisors (121105828084).

161438467628 is a wasteful number, since it uses less digits than its factorization.

161438467628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3853912 (or 3853910 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 56.

The spelling of 161438467628 in words is "one hundred sixty-one billion, four hundred thirty-eight million, four hundred sixty-seven thousand, six hundred twenty-eight".