7948537009 has 6 divisors (see below), whose sum is σ = 9246257394. Its totient is φ = 6813031680.

The previous prime is 7948537001. The next prime is 7948537039. The reversal of 7948537009 is 9007358497.

It can be written as a sum of positive squares in only one way, i.e., 7341062400 + 607474609 = 85680^2 + 24647^2 .

It is not a de Polignac number, because 7948537009 - 2³ = 7948537001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7948537001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 81107472 + ... + 81107569.

It is an arithmetic number, because the mean of its divisors is an integer number (1541042899).

Almost surely, 2^7948537009 is an apocalyptic number.

It is an amenable number.

7948537009 is a deficient number, since it is larger than the sum of its proper divisors (1297720385).

7948537009 is a wasteful number, since it uses less digits than its factorization.

7948537009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162215055 (or 162215048 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 52.

The square root of 7948537009 is about 89154.5680770200. The cubic root of 7948537009 is about 1995.7021884400.

The spelling of 7948537009 in words is "seven billion, nine hundred forty-eight million, five hundred thirty-seven thousand, nine".