87722667572 has 12 divisors (see below), whose sum is σ = 162544942980. Its totient is φ = 41281255296.

The previous prime is 87722667551. The next prime is 87722667577. The reversal of 87722667572 is 27576622778.

It can be written as a sum of positive squares in 2 ways, for example, as 45777169936 + 41945497636 = 213956^2 + 204806^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87722667577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 645019547 + ... + 645019682.

It is an arithmetic number, because the mean of its divisors is an integer number (13545411915).

Almost surely, 2^87722667572 is an apocalyptic number.

It is an amenable number.

87722667572 is a deficient number, since it is larger than the sum of its proper divisors (74822275408).

87722667572 is a wasteful number, since it uses less digits than its factorization.

87722667572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1290039250 (or 1290039248 counting only the distinct ones).

The product of its digits is 27659520, while the sum is 59.

The spelling of 87722667572 in words is "eighty-seven billion, seven hundred twenty-two million, six hundred sixty-seven thousand, five hundred seventy-two".