75508520171087 has 2 divisors, whose sum is σ = 75508520171088. Its totient is φ = 75508520171086.

The previous prime is 75508520171053. The next prime is 75508520171093. The reversal of 75508520171087 is 78017102580557.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 75508520171087 - 2²⁰ = 75508519122511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75508520171047) 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 as a sum of consecutive naturals, namely, 37754260085543 + 37754260085544.

It is an arithmetic number, because the mean of its divisors is an integer number (37754260085544).

Almost surely, 2^{75508520171087} is an apocalyptic number.

75508520171087 is a deficient number, since it is larger than the sum of its proper divisors (1).

75508520171087 is an equidigital number, since it uses as much as digits as its factorization.

75508520171087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5488000, while the sum is 56.

The spelling of 75508520171087 in words is "seventy-five trillion, five hundred eight billion, five hundred twenty million, one hundred seventy-one thousand, eighty-seven".