75585835421 has 4 divisors (see below), whose sum is σ = 80032061052. Its totient is φ = 71139609792.

The previous prime is 75585835363. The next prime is 75585835447. The reversal of 75585835421 is 12453858557.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12453858557 = 7 ⋅1779122651.

It can be written as a sum of positive squares in 2 ways, for example, as 46423442521 + 29162392900 = 215461^2 + 170770^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75585835421 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 (75525835421) 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, 2223112790 + ... + 2223112823.

It is an arithmetic number, because the mean of its divisors is an integer number (20008015263).

Almost surely, 2^75585835421 is an apocalyptic number.

It is an amenable number.

75585835421 is a deficient number, since it is larger than the sum of its proper divisors (4446225631).

75585835421 is a wasteful number, since it uses less digits than its factorization.

75585835421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4446225630.

The product of its digits is 6720000, while the sum is 53.

The spelling of 75585835421 in words is "seventy-five billion, five hundred eighty-five million, eight hundred thirty-five thousand, four hundred twenty-one".