87544219109 has 2 divisors, whose sum is σ = 87544219110. Its totient is φ = 87544219108.

The previous prime is 87544219097. The next prime is 87544219117. The reversal of 87544219109 is 90191244578.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86865772900 + 678446209 = 294730^2 + 26047^2 .

It is a cyclic number.

It is not a de Polignac number, because 87544219109 - 2¹² = 87544215013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87544219409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43772109554 + 43772109555.

It is an arithmetic number, because the mean of its divisors is an integer number (43772109555).

Almost surely, 2^87544219109 is an apocalyptic number.

It is an amenable number.

87544219109 is a deficient number, since it is larger than the sum of its proper divisors (1).

87544219109 is an equidigital number, since it uses as much as digits as its factorization.

87544219109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 50.

The spelling of 87544219109 in words is "eighty-seven billion, five hundred forty-four million, two hundred nineteen thousand, one hundred nine".