163749737555 has 4 divisors (see below), whose sum is σ = 196499685072. Its totient is φ = 130999790040.

The previous prime is 163749737549. The next prime is 163749737573. The reversal of 163749737555 is 555737947361.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 163749737555 - 2⁴ = 163749737539 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16374973751 + ... + 16374973760.

It is an arithmetic number, because the mean of its divisors is an integer number (49124921268).

Almost surely, 2^163749737555 is an apocalyptic number.

163749737555 is a deficient number, since it is larger than the sum of its proper divisors (32749947517).

163749737555 is an equidigital number, since it uses as much as digits as its factorization.

163749737555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32749947516.

The product of its digits is 83349000, while the sum is 62.

The spelling of 163749737555 in words is "one hundred sixty-three billion, seven hundred forty-nine million, seven hundred thirty-seven thousand, five hundred fifty-five".