75007878685 has 8 divisors (see below), whose sum is σ = 90128361816. Its totient is φ = 59927031360.

The previous prime is 75007878679. The next prime is 75007878731. The reversal of 75007878685 is 58687870057.

It can be written as a sum of positive squares in 4 ways, for example, as 34605672676 + 40402206009 = 186026^2 + 201003^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 75007878685 - 2³ = 75007878677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9904786 + ... + 9912355.

It is an arithmetic number, because the mean of its divisors is an integer number (11266045227).

Almost surely, 2^75007878685 is an apocalyptic number.

It is an amenable number.

75007878685 is a deficient number, since it is larger than the sum of its proper divisors (15120483131).

75007878685 is a wasteful number, since it uses less digits than its factorization.

75007878685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19817903.

The product of its (nonzero) digits is 26342400, while the sum is 61.

The spelling of 75007878685 in words is "seventy-five billion, seven million, eight hundred seventy-eight thousand, six hundred eighty-five".