7745424144 has 40 divisors (see below), whose sum is σ = 20497042272. Its totient is φ = 2518836480.

The previous prime is 7745424131. The next prime is 7745424199. The reversal of 7745424144 is 4414245477.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 7745424096 and 7745424105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1965874 + ... + 1969809.

Almost surely, 2^7745424144 is an apocalyptic number.

It is an amenable number.

7745424144 is an abundant number, since it is smaller than the sum of its proper divisors (12751618128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7745424144 is a wasteful number, since it uses less digits than its factorization.

7745424144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3935735 (or 3935729 counting only the distinct ones).

The product of its digits is 501760, while the sum is 42.

The square root of 7745424144 is about 88008.0913552839. The cubic root of 7745424144 is about 1978.5562498374.

The spelling of 7745424144 in words is "seven billion, seven hundred forty-five million, four hundred twenty-four thousand, one hundred forty-four".