78520607075 has 6 divisors (see below), whose sum is σ = 97365552804. Its totient is φ = 62816485640.

The previous prime is 78520607069. The next prime is 78520607093. The reversal of 78520607075 is 57070602587.

It is a happy number.

It is not a de Polignac number, because 78520607075 - 2⁴ = 78520607059 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1570412117 + ... + 1570412166.

It is an arithmetic number, because the mean of its divisors is an integer number (16227592134).

Almost surely, 2^78520607075 is an apocalyptic number.

78520607075 is a deficient number, since it is larger than the sum of its proper divisors (18844945729).

78520607075 is a wasteful number, since it uses less digits than its factorization.

78520607075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3140824293 (or 3140824288 counting only the distinct ones).

The product of its (nonzero) digits is 823200, while the sum is 47.

The spelling of 78520607075 in words is "seventy-eight billion, five hundred twenty million, six hundred seven thousand, seventy-five".