75844668013 has 4 divisors (see below), whose sum is σ = 75846252220. Its totient is φ = 75843083808.

The previous prime is 75844668001. The next prime is 75844668019. The reversal of 75844668013 is 31086644857.

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 69014967849 + 6829700164 = 262707^2 + 82642^2 .

It is a cyclic number.

It is not a de Polignac number, because 75844668013 - 2⁵ = 75844667981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75844668019) 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, 717978 + ... + 816811.

It is an arithmetic number, because the mean of its divisors is an integer number (18961563055).

Almost surely, 2^75844668013 is an apocalyptic number.

It is an amenable number.

75844668013 is a deficient number, since it is larger than the sum of its proper divisors (1584207).

75844668013 is a wasteful number, since it uses less digits than its factorization.

75844668013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584206.

The product of its (nonzero) digits is 3870720, while the sum is 52.

The spelling of 75844668013 in words is "seventy-five billion, eight hundred forty-four million, six hundred sixty-eight thousand, thirteen".