161440377047 has 4 divisors (see below), whose sum is σ = 161447125776. Its totient is φ = 161433628320.

The previous prime is 161440377041. The next prime is 161440377061. The reversal of 161440377047 is 740773044161.

161440377047 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161440377047 - 2⁶ = 161440376983 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161440376989 and 161440377007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161440377041) 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, 3338354 + ... + 3386367.

It is an arithmetic number, because the mean of its divisors is an integer number (40361781444).

Almost surely, 2^161440377047 is an apocalyptic number.

161440377047 is a deficient number, since it is larger than the sum of its proper divisors (6748729).

161440377047 is an equidigital number, since it uses as much as digits as its factorization.

161440377047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6748728.

The product of its (nonzero) digits is 395136, while the sum is 44.

The spelling of 161440377047 in words is "one hundred sixty-one billion, four hundred forty million, three hundred seventy-seven thousand, forty-seven".