7944945213 has 16 divisors (see below), whose sum is σ = 10892448896. Its totient is φ = 5147375040.

The previous prime is 7944945163. The next prime is 7944945221. The reversal of 7944945213 is 3125494497.

It is not a de Polignac number, because 7944945213 - 2²¹ = 7942848061 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 (7944945263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52728 + ... + 136638.

It is an arithmetic number, because the mean of its divisors is an integer number (680778056).

Almost surely, 2^7944945213 is an apocalyptic number.

It is an amenable number.

7944945213 is a deficient number, since it is larger than the sum of its proper divisors (2947503683).

7944945213 is a wasteful number, since it uses less digits than its factorization.

7944945213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84804.

The product of its digits is 1088640, while the sum is 48.

The square root of 7944945213 is about 89134.4221555287. The cubic root of 7944945213 is about 1995.4015362521.

The spelling of 7944945213 in words is "seven billion, nine hundred forty-four million, nine hundred forty-five thousand, two hundred thirteen".