75638551 has 2 divisors, whose sum is σ = 75638552. Its totient is φ = 75638550.

The previous prime is 75638503. The next prime is 75638561. The reversal of 75638551 is 15583657.

It is a strong prime.

It is an emirp because it is prime and its reverse (15583657) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75638551 - 2¹¹ = 75636503 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75638561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37819275 + 37819276.

It is an arithmetic number, because the mean of its divisors is an integer number (37819276).

Almost surely, 2^75638551 is an apocalyptic number.

75638551 is a deficient number, since it is larger than the sum of its proper divisors (1).

75638551 is an equidigital number, since it uses as much as digits as its factorization.

75638551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 126000, while the sum is 40.

The square root of 75638551 is about 8697.0426582833. The cubic root of 75638551 is about 422.9097848357.

The spelling of 75638551 in words is "seventy-five million, six hundred thirty-eight thousand, five hundred fifty-one".