161144957783 has 4 divisors (see below), whose sum is σ = 161145995808. Its totient is φ = 161143919760.

The previous prime is 161144957747. The next prime is 161144957791. The reversal of 161144957783 is 387759441161.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 161144957783 - 2⁸ = 161144957527 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 (161144957723) 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, 233966 + ... + 614027.

It is an arithmetic number, because the mean of its divisors is an integer number (40286498952).

Almost surely, 2^161144957783 is an apocalyptic number.

161144957783 is a deficient number, since it is larger than the sum of its proper divisors (1038025).

161144957783 is an equidigital number, since it uses as much as digits as its factorization.

161144957783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038024.

The product of its digits is 5080320, while the sum is 56.

The spelling of 161144957783 in words is "one hundred sixty-one billion, one hundred forty-four million, nine hundred fifty-seven thousand, seven hundred eighty-three".