87236845565 has 8 divisors (see below), whose sum is σ = 105386794200. Its totient is φ = 69321090112.

The previous prime is 87236845561. The next prime is 87236845573. The reversal of 87236845565 is 56554863278.

It can be written as a sum of positive squares in 4 ways, for example, as 14235830596 + 73001014969 = 119314^2 + 270187^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87236845565 - 2² = 87236845561 is a prime.

It is a super-2 number, since 2×87236845565² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87236845561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58547474 + ... + 58548963.

It is an arithmetic number, because the mean of its divisors is an integer number (13173349275).

Almost surely, 2^87236845565 is an apocalyptic number.

It is an amenable number.

87236845565 is a deficient number, since it is larger than the sum of its proper divisors (18149948635).

87236845565 is a wasteful number, since it uses less digits than its factorization.

87236845565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117096591.

The product of its digits is 48384000, while the sum is 59.

The spelling of 87236845565 in words is "eighty-seven billion, two hundred thirty-six million, eight hundred forty-five thousand, five hundred sixty-five".