87641855 has 16 divisors (see below), whose sum is σ = 120529920. Its totient is φ = 59929632.

The previous prime is 87641843. The next prime is 87641861. The reversal of 87641855 is 55814678.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-87641855 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9962 + ... + 16568.

It is an arithmetic number, because the mean of its divisors is an integer number (7533120).

Almost surely, 2^87641855 is an apocalyptic number.

87641855 is a deficient number, since it is larger than the sum of its proper divisors (32888065).

87641855 is a wasteful number, since it uses less digits than its factorization.

87641855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6998.

The product of its digits is 268800, while the sum is 44.

The square root of 87641855 is about 9361.7228649432. The cubic root of 87641855 is about 444.1917830010.

The spelling of 87641855 in words is "eighty-seven million, six hundred forty-one thousand, eight hundred fifty-five".