87717186145 has 4 divisors (see below), whose sum is σ = 105260623380. Its totient is φ = 70173748912.

The previous prime is 87717186131. The next prime is 87717186203. The reversal of 87717186145 is 54168171778.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37032768721 + 50684417424 = 192439^2 + 225132^2 .

It is a cyclic number.

It is not a de Polignac number, because 87717186145 - 2¹¹ = 87717184097 is a prime.

It is a super-2 number, since 2×87717186145² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8771718610 + ... + 8771718619.

It is an arithmetic number, because the mean of its divisors is an integer number (26315155845).

Almost surely, 2^87717186145 is an apocalyptic number.

It is an amenable number.

87717186145 is a deficient number, since it is larger than the sum of its proper divisors (17543437235).

87717186145 is a wasteful number, since it uses less digits than its factorization.

87717186145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17543437234.

The product of its digits is 2634240, while the sum is 55.

The spelling of 87717186145 in words is "eighty-seven billion, seven hundred seventeen million, one hundred eighty-six thousand, one hundred forty-five".