75145574381 has 8 divisors (see below), whose sum is σ = 75270195000. Its totient is φ = 75021004800.

The previous prime is 75145574363. The next prime is 75145574429. The reversal of 75145574381 is 18347554157.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 22731592900 + 52413981481 = 150770^2 + 228941^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 75145574381 - 2¹⁸ = 75145312237 is a prime.

It is a super-2 number, since 2×75145574381² (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 (75145574981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3894245 + ... + 3913493.

It is an arithmetic number, because the mean of its divisors is an integer number (9408774375).

Almost surely, 2^75145574381 is an apocalyptic number.

It is an amenable number.

75145574381 is a deficient number, since it is larger than the sum of its proper divisors (124620619).

75145574381 is a wasteful number, since it uses less digits than its factorization.

75145574381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25519.

The product of its digits is 2352000, while the sum is 50.

The spelling of 75145574381 in words is "seventy-five billion, one hundred forty-five million, five hundred seventy-four thousand, three hundred eighty-one".