945944181 has 48 divisors (see below), whose sum is σ = 1693036800. Its totient is φ = 495590400.

The previous prime is 945944179. The next prime is 945944213. The reversal of 945944181 is 181449549.

It is a happy number.

It is not a de Polignac number, because 945944181 - 2¹ = 945944179 is a prime.

It is a super-2 number, since 2×945944181² = 1789620787135521522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (945944171) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 119845 + ... + 127493.

It is an arithmetic number, because the mean of its divisors is an integer number (35271600).

Almost surely, 2^945944181 is an apocalyptic number.

945944181 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

945944181 is a deficient number, since it is larger than the sum of its proper divisors (747092619).

945944181 is a wasteful number, since it uses less digits than its factorization.

945944181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7826 (or 7823 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 945944181 is about 30756.2055689579. The cubic root of 945944181 is about 981.6466074089.

The spelling of 945944181 in words is "nine hundred forty-five million, nine hundred forty-four thousand, one hundred eighty-one".