87853579777 has 4 divisors (see below), whose sum is σ = 87858323460. Its totient is φ = 87848836096.

The previous prime is 87853579741. The next prime is 87853579783. The reversal of 87853579777 is 77797535878.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77797535878 = 2 ⋅38898767939.

It can be written as a sum of positive squares in 2 ways, for example, as 44152095376 + 43701484401 = 210124^2 + 209049^2 .

It is a cyclic number.

It is not a de Polignac number, because 87853579777 - 2¹¹ = 87853577729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87853571777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2343952 + ... + 2381137.

It is an arithmetic number, because the mean of its divisors is an integer number (21964580865).

Almost surely, 2^87853579777 is an apocalyptic number.

It is an amenable number.

87853579777 is a deficient number, since it is larger than the sum of its proper divisors (4743683).

87853579777 is a wasteful number, since it uses less digits than its factorization.

87853579777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4743682.

The product of its digits is 726062400, while the sum is 73.

The spelling of 87853579777 in words is "eighty-seven billion, eight hundred fifty-three million, five hundred seventy-nine thousand, seven hundred seventy-seven".