78607571825 has 24 divisors (see below), whose sum is σ = 100866367800. Its totient is φ = 60698408960.

The previous prime is 78607571771. The next prime is 78607571831. The reversal of 78607571825 is 52817570687.

It can be written as a sum of positive squares in 12 ways, for example, as 795664 + 78606776161 = 892^2 + 280369^2 .

It is a de Polignac number, because none of the positive numbers 2^k-78607571825 is a prime.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2546081 + ... + 2576769.

It is an arithmetic number, because the mean of its divisors is an integer number (4202765325).

Almost surely, 2^78607571825 is an apocalyptic number.

It is an amenable number.

78607571825 is a deficient number, since it is larger than the sum of its proper divisors (22258795975).

78607571825 is a wasteful number, since it uses less digits than its factorization.

78607571825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34261 (or 34256 counting only the distinct ones).

The product of its (nonzero) digits is 6585600, while the sum is 56.

The spelling of 78607571825 in words is "seventy-eight billion, six hundred seven million, five hundred seventy-one thousand, eight hundred twenty-five".