87561655 has 8 divisors (see below), whose sum is σ = 105175872. Its totient is φ = 69981408.

The previous prime is 87561653. The next prime is 87561689. The reversal of 87561655 is 55616578.

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 87561655 - 2¹ = 87561653 is a prime.

It is a Duffinian number.

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, 2424 + ... + 13453.

It is an arithmetic number, because the mean of its divisors is an integer number (13146984).

Almost surely, 2^87561655 is an apocalyptic number.

87561655 is a deficient number, since it is larger than the sum of its proper divisors (17614217).

87561655 is a wasteful number, since it uses less digits than its factorization.

87561655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16985.

The product of its digits is 252000, while the sum is 43.

The square root of 87561655 is about 9357.4384849701. The cubic root of 87561655 is about 444.0562501442.

The spelling of 87561655 in words is "eighty-seven million, five hundred sixty-one thousand, six hundred fifty-five".