161047309943 has 4 divisors (see below), whose sum is σ = 173435564568. Its totient is φ = 148659055320.

The previous prime is 161047309849. The next prime is 161047309961. The reversal of 161047309943 is 349903740161.

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 161047309943 - 2²⁰ = 161046261367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161047309543) 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, 6194127293 + ... + 6194127318.

It is an arithmetic number, because the mean of its divisors is an integer number (43358891142).

Almost surely, 2^161047309943 is an apocalyptic number.

161047309943 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

161047309943 is a deficient number, since it is larger than the sum of its proper divisors (12388254625).

161047309943 is a wasteful number, since it uses less digits than its factorization.

161047309943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12388254624.

The product of its (nonzero) digits is 489888, while the sum is 47.

The spelling of 161047309943 in words is "one hundred sixty-one billion, forty-seven million, three hundred nine thousand, nine hundred forty-three".