749180161 has 4 divisors (see below), whose sum is σ = 758206512. Its totient is φ = 740153812.

The previous prime is 749180153. The next prime is 749180183. The reversal of 749180161 is 161081947.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 161081947 = 13 ⋅12390919.

It is a cyclic number.

It is not a de Polignac number, because 749180161 - 2³ = 749180153 is a prime.

It is a super-2 number, since 2×749180161² = 1122541827271971842, which contains 22 as substring.

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 749180161.

It is not an unprimeable number, because it can be changed into a prime (749180561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4513051 + ... + 4513216.

It is an arithmetic number, because the mean of its divisors is an integer number (189551628).

Almost surely, 2^749180161 is an apocalyptic number.

It is an amenable number.

749180161 is a deficient number, since it is larger than the sum of its proper divisors (9026351).

749180161 is an equidigital number, since it uses as much as digits as its factorization.

749180161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9026350.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 749180161 is about 27371.1556387377. The cubic root of 749180161 is about 908.2291209755.

The spelling of 749180161 in words is "seven hundred forty-nine million, one hundred eighty thousand, one hundred sixty-one".