7748907945 has 16 divisors (see below), whose sum is σ = 12449703552. Its totient is φ = 4115600640.

The previous prime is 7748907941. The next prime is 7748908021. The reversal of 7748907945 is 5497098477.

It is not a de Polignac number, because 7748907945 - 2² = 7748907941 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7748907941) 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, 1068157 + ... + 1075386.

It is an arithmetic number, because the mean of its divisors is an integer number (778106472).

Almost surely, 2^7748907945 is an apocalyptic number.

It is an amenable number.

7748907945 is a deficient number, since it is larger than the sum of its proper divisors (4700795607).

7748907945 is a wasteful number, since it uses less digits than its factorization.

7748907945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2143792.

The product of its (nonzero) digits is 17781120, while the sum is 60.

The square root of 7748907945 is about 88027.8816341732. The cubic root of 7748907945 is about 1978.8528491767.

The spelling of 7748907945 in words is "seven billion, seven hundred forty-eight million, nine hundred seven thousand, nine hundred forty-five".