161311828747 has 8 divisors (see below), whose sum is σ = 163263396240. Its totient is φ = 159360453120.

The previous prime is 161311828703. The next prime is 161311828763. The reversal of 161311828747 is 747828113161.

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

It is a cyclic number.

It is not a de Polignac number, because 161311828747 - 2⁷ = 161311828619 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161311828747.

It is not an unprimeable number, because it can be changed into a prime (161311828247) 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, 2384347 + ... + 2451067.

It is an arithmetic number, because the mean of its divisors is an integer number (20407924530).

Almost surely, 2^161311828747 is an apocalyptic number.

161311828747 is a deficient number, since it is larger than the sum of its proper divisors (1951567493).

161311828747 is an equidigital number, since it uses as much as digits as its factorization.

161311828747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95933.

The product of its digits is 451584, while the sum is 49.

The spelling of 161311828747 in words is "one hundred sixty-one billion, three hundred eleven million, eight hundred twenty-eight thousand, seven hundred forty-seven".