87561656 has 32 divisors (see below), whose sum is σ = 202067040. Its totient is φ = 34639488.

The previous prime is 87561653. The next prime is 87561689. The reversal of 87561656 is 65616578.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87561653) 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, 59411 + ... + 60866.

It is an arithmetic number, because the mean of its divisors is an integer number (6314595).

Almost surely, 2^87561656 is an apocalyptic number.

It is an amenable number.

87561656 is an abundant number, since it is smaller than the sum of its proper divisors (114505384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87561656 is a wasteful number, since it uses less digits than its factorization.

87561656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120303 (or 120299 counting only the distinct ones).

The product of its digits is 302400, while the sum is 44.

The square root of 87561656 is about 9357.4385384036. The cubic root of 87561656 is about 444.0562518346.

The spelling of 87561656 in words is "eighty-seven million, five hundred sixty-one thousand, six hundred fifty-six".