87965815859 has 4 divisors (see below), whose sum is σ = 88009172160. Its totient is φ = 87922459560.

The previous prime is 87965815831. The next prime is 87965815879. The reversal of 87965815859 is 95851856978.

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 87965815859 - 2⁸ = 87965815603 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87965815792 and 87965815801.

It is not an unprimeable number, because it can be changed into a prime (87965815879) 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, 21675107 + ... + 21679164.

It is an arithmetic number, because the mean of its divisors is an integer number (22002293040).

Almost surely, 2^87965815859 is an apocalyptic number.

87965815859 is a deficient number, since it is larger than the sum of its proper divisors (43356301).

87965815859 is a wasteful number, since it uses less digits than its factorization.

87965815859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43356300.

The product of its digits is 217728000, while the sum is 71.

The spelling of 87965815859 in words is "eighty-seven billion, nine hundred sixty-five million, eight hundred fifteen thousand, eight hundred fifty-nine".