87886505819 has 4 divisors (see below), whose sum is σ = 100441720944. Its totient is φ = 75331290696.

The previous prime is 87886505797. The next prime is 87886505873. The reversal of 87886505819 is 91850568878.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87886505819 is a prime.

It is a super-2 number, since 2×87886505819² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87886505419) 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, 6277607552 + ... + 6277607565.

It is an arithmetic number, because the mean of its divisors is an integer number (25110430236).

Almost surely, 2^87886505819 is an apocalyptic number.

87886505819 is a deficient number, since it is larger than the sum of its proper divisors (12555215125).

87886505819 is a wasteful number, since it uses less digits than its factorization.

87886505819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12555215124.

The product of its (nonzero) digits is 38707200, while the sum is 65.

The spelling of 87886505819 in words is "eighty-seven billion, eight hundred eighty-six million, five hundred five thousand, eight hundred nineteen".