7485138817585 has 24 divisors (see below), whose sum is σ = 10632418430760. Its totient is φ = 5024988291840.

The previous prime is 7485138817577. The next prime is 7485138817601. The reversal of 7485138817585 is 5857188315847.

It can be written as a sum of positive squares in 4 ways, for example, as 247941255969 + 7237197561616 = 497937^2 + 2690204^2 .

It is not a de Polignac number, because 7485138817585 - 2³ = 7485138817577 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 475843300 + ... + 475859029.

It is an arithmetic number, because the mean of its divisors is an integer number (443017434615).

Almost surely, 2^{7485138817585} is an apocalyptic number.

It is an amenable number.

7485138817585 is a deficient number, since it is larger than the sum of its proper divisors (3147279613175).

7485138817585 is a wasteful number, since it uses less digits than its factorization.

7485138817585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951702369 (or 951702358 counting only the distinct ones).

The product of its digits is 301056000, while the sum is 70.

The spelling of 7485138817585 in words is "seven trillion, four hundred eighty-five billion, one hundred thirty-eight million, eight hundred seventeen thousand, five hundred eighty-five".