87186516479 has 4 divisors (see below), whose sum is σ = 87331586160. Its totient is φ = 87041446800.

The previous prime is 87186516451. The next prime is 87186516623. The reversal of 87186516479 is 97461568178.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87186516479 - 2⁸ = 87186516223 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 (87186516409) 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, 72533939 + ... + 72535140.

It is an arithmetic number, because the mean of its divisors is an integer number (21832896540).

Almost surely, 2^87186516479 is an apocalyptic number.

87186516479 is a deficient number, since it is larger than the sum of its proper divisors (145069681).

87186516479 is a wasteful number, since it uses less digits than its factorization.

87186516479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145069680.

The product of its digits is 20321280, while the sum is 62.

The spelling of 87186516479 in words is "eighty-seven billion, one hundred eighty-six million, five hundred sixteen thousand, four hundred seventy-nine".