161256416753 has 4 divisors (see below), whose sum is σ = 164298990708. Its totient is φ = 158213842800.

The previous prime is 161256416731. The next prime is 161256416771. The reversal of 161256416753 is 357614652161.

It is a happy number.

161256416753 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 can be written as a sum of positive squares in 2 ways, for example, as 141965429089 + 19290987664 = 376783^2 + 138892^2 .

It is a cyclic number.

It is not a de Polignac number, because 161256416753 - 2⁶ = 161256416689 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161256416698 and 161256416707.

It is not an unprimeable number, because it can be changed into a prime (161256416723) 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, 1521286898 + ... + 1521287003.

It is an arithmetic number, because the mean of its divisors is an integer number (41074747677).

Almost surely, 2^161256416753 is an apocalyptic number.

It is an amenable number.

161256416753 is a deficient number, since it is larger than the sum of its proper divisors (3042573955).

161256416753 is an equidigital number, since it uses as much as digits as its factorization.

161256416753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3042573954.

The product of its digits is 907200, while the sum is 47.

The spelling of 161256416753 in words is "one hundred sixty-one billion, two hundred fifty-six million, four hundred sixteen thousand, seven hundred fifty-three".