75505731293 has 4 divisors (see below), whose sum is σ = 75699833820. Its totient is φ = 75311628768.

The previous prime is 75505731233. The next prime is 75505731299. The reversal of 75505731293 is 39213750557.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39213750557 = 55621 ⋅705017.

It can be written as a sum of positive squares in 2 ways, for example, as 49520936089 + 25984795204 = 222533^2 + 161198^2 .

It is a cyclic number.

It is not a de Polignac number, because 75505731293 - 2¹⁰ = 75505730269 is a prime.

It is a super-2 number, since 2×75505731293² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75505731299) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 97050680 + ... + 97051457.

It is an arithmetic number, because the mean of its divisors is an integer number (18924958455).

Almost surely, 2^75505731293 is an apocalyptic number.

It is an amenable number.

75505731293 is a deficient number, since it is larger than the sum of its proper divisors (194102527).

75505731293 is a wasteful number, since it uses less digits than its factorization.

75505731293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194102526.

The product of its (nonzero) digits is 992250, while the sum is 47.

The spelling of 75505731293 in words is "seventy-five billion, five hundred five million, seven hundred thirty-one thousand, two hundred ninety-three".