87684364511 has 4 divisors (see below), whose sum is σ = 87684964224. Its totient is φ = 87683764800.

The previous prime is 87684364477. The next prime is 87684364513. The reversal of 87684364511 is 11546348678.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87684364511 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 (87684364513) 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, 79106 + ... + 426176.

It is an arithmetic number, because the mean of its divisors is an integer number (21921241056).

Almost surely, 2^87684364511 is an apocalyptic number.

87684364511 is a deficient number, since it is larger than the sum of its proper divisors (599713).

87684364511 is a wasteful number, since it uses less digits than its factorization.

87684364511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599712.

The product of its digits is 3870720, while the sum is 53.

The spelling of 87684364511 in words is "eighty-seven billion, six hundred eighty-four million, three hundred sixty-four thousand, five hundred eleven".