75855553 has 2 divisors, whose sum is σ = 75855554. Its totient is φ = 75855552.

The previous prime is 75855551. The next prime is 75855557. The reversal of 75855553 is 35555857.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45252529 + 30603024 = 6727^2 + 5532^2 .

It is a cyclic number.

It is not a de Polignac number, because 75855553 - 2¹ = 75855551 is a prime.

It is a super-3 number, since 3×75855553³ (a number of 25 digits) contains 333 as substring.

Together with 75855551, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (75855551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37927776 + 37927777.

It is an arithmetic number, because the mean of its divisors is an integer number (37927777).

Almost surely, 2^75855553 is an apocalyptic number.

It is an amenable number.

75855553 is a deficient number, since it is larger than the sum of its proper divisors (1).

75855553 is an equidigital number, since it uses as much as digits as its factorization.

75855553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 525000, while the sum is 43.

The square root of 75855553 is about 8709.5093432409. The cubic root of 75855553 is about 423.3138320871.

The spelling of 75855553 in words is "seventy-five million, eight hundred fifty-five thousand, five hundred fifty-three".