78509125245 has 16 divisors (see below), whose sum is σ = 125618127552. Its totient is φ = 41870357760.

The previous prime is 78509125243. The next prime is 78509125259. The reversal of 78509125245 is 54252190587.

It is not a de Polignac number, because 78509125245 - 2¹ = 78509125243 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 78509125194 and 78509125203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78509125243) 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, 865989 + ... + 952341.

It is an arithmetic number, because the mean of its divisors is an integer number (7851132972).

Almost surely, 2^78509125245 is an apocalyptic number.

It is an amenable number.

78509125245 is a deficient number, since it is larger than the sum of its proper divisors (47109002307).

78509125245 is a wasteful number, since it uses less digits than its factorization.

78509125245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146972.

The product of its (nonzero) digits is 1008000, while the sum is 48.

The spelling of 78509125245 in words is "seventy-eight billion, five hundred nine million, one hundred twenty-five thousand, two hundred forty-five".