7807509945 has 16 divisors (see below), whose sum is σ = 13880017920. Its totient is φ = 4164005232.

The previous prime is 7807509937. The next prime is 7807509961. The reversal of 7807509945 is 5499057087.

It is not a de Polignac number, because 7807509945 - 2³ = 7807509937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7807509891 and 7807509900.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28916569 + ... + 28916838.

It is an arithmetic number, because the mean of its divisors is an integer number (867501120).

Almost surely, 2^7807509945 is an apocalyptic number.

It is an amenable number.

7807509945 is a deficient number, since it is larger than the sum of its proper divisors (6072507975).

7807509945 is a wasteful number, since it uses less digits than its factorization.

7807509945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57833421 (or 57833415 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 54.

The square root of 7807509945 is about 88360.1151255475. The cubic root of 7807509945 is about 1983.8287599920.

The spelling of 7807509945 in words is "seven billion, eight hundred seven million, five hundred nine thousand, nine hundred forty-five".