161253755743 has 4 divisors (see below), whose sum is σ = 161282347408. Its totient is φ = 161225164080.

The previous prime is 161253755737. The next prime is 161253755759. The reversal of 161253755743 is 347557352161.

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 161253755743 - 2³³ = 152663821151 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 (161253755843) 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, 14287371 + ... + 14298652.

It is an arithmetic number, because the mean of its divisors is an integer number (40320586852).

Almost surely, 2^161253755743 is an apocalyptic number.

161253755743 is a deficient number, since it is larger than the sum of its proper divisors (28591665).

161253755743 is an equidigital number, since it uses as much as digits as its factorization.

161253755743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28591664.

The product of its digits is 2646000, while the sum is 49.

The spelling of 161253755743 in words is "one hundred sixty-one billion, two hundred fifty-three million, seven hundred fifty-five thousand, seven hundred forty-three".