75531113387 has 4 divisors (see below), whose sum is σ = 75533282376. Its totient is φ = 75528944400.

The previous prime is 75531113377. The next prime is 75531113393. The reversal of 75531113387 is 78331113557.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78331113557 = 79 ⋅991533083.

It is a cyclic number.

It is not a de Polignac number, because 75531113387 - 2⁶ = 75531113323 is a prime.

It is a super-2 number, since 2×75531113387² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75531113347) 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, 1031393 + ... + 1102194.

It is an arithmetic number, because the mean of its divisors is an integer number (18883320594).

Almost surely, 2^75531113387 is an apocalyptic number.

75531113387 is a deficient number, since it is larger than the sum of its proper divisors (2168989).

75531113387 is a wasteful number, since it uses less digits than its factorization.

75531113387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2168988.

The product of its digits is 264600, while the sum is 44.

The spelling of 75531113387 in words is "seventy-five billion, five hundred thirty-one million, one hundred thirteen thousand, three hundred eighty-seven".