87605350748581 has 2 divisors, whose sum is σ = 87605350748582. Its totient is φ = 87605350748580.

The previous prime is 87605350748569. The next prime is 87605350748639. The reversal of 87605350748581 is 18584705350678.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75617372430625 + 11987978317956 = 8695825^2 + 3462366^2 .

It is a cyclic number.

It is not a de Polignac number, because 87605350748581 - 2³⁷ = 87467911795109 is a prime.

It is a super-2 number, since 2×87605350748581² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87605350748501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43802675374290 + 43802675374291.

It is an arithmetic number, because the mean of its divisors is an integer number (43802675374291).

Almost surely, 2^{87605350748581} is an apocalyptic number.

It is an amenable number.

87605350748581 is a deficient number, since it is larger than the sum of its proper divisors (1).

87605350748581 is an equidigital number, since it uses as much as digits as its factorization.

87605350748581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225792000, while the sum is 67.

The spelling of 87605350748581 in words is "eighty-seven trillion, six hundred five billion, three hundred fifty million, seven hundred forty-eight thousand, five hundred eighty-one".