75605665015513 has 4 divisors (see below), whose sum is σ = 75605729986228. Its totient is φ = 75605600044800.

The previous prime is 75605665015469. The next prime is 75605665015547. The reversal of 75605665015513 is 31551056650657.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 56550580480144 + 19055084535369 = 7520012^2 + 4365213^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75605665015513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75605665016513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30707388 + ... + 33078013.

It is an arithmetic number, because the mean of its divisors is an integer number (18901432496557).

Almost surely, 2^{75605665015513} is an apocalyptic number.

It is an amenable number.

75605665015513 is a deficient number, since it is larger than the sum of its proper divisors (64970715).

75605665015513 is a wasteful number, since it uses less digits than its factorization.

75605665015513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64970714.

The product of its (nonzero) digits is 14175000, while the sum is 55.

The spelling of 75605665015513 in words is "seventy-five trillion, six hundred five billion, six hundred sixty-five million, fifteen thousand, five hundred thirteen".