75525582581 has 2 divisors, whose sum is σ = 75525582582. Its totient is φ = 75525582580.

The previous prime is 75525582493. The next prime is 75525582611. The reversal of 75525582581 is 18528552557.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74838356356 + 687226225 = 273566^2 + 26215^2 .

It is a cyclic number.

It is not a de Polignac number, because 75525582581 - 2²² = 75521388277 is a prime.

It is a super-2 number, since 2×75525582581² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75525581581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37762791290 + 37762791291.

It is an arithmetic number, because the mean of its divisors is an integer number (37762791291).

Almost surely, 2^75525582581 is an apocalyptic number.

It is an amenable number.

75525582581 is a deficient number, since it is larger than the sum of its proper divisors (1).

75525582581 is an equidigital number, since it uses as much as digits as its factorization.

75525582581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5600000, while the sum is 53.

The spelling of 75525582581 in words is "seventy-five billion, five hundred twenty-five million, five hundred eighty-two thousand, five hundred eighty-one".