87109408406 has 4 divisors (see below), whose sum is σ = 130664112612. Its totient is φ = 43554704202.

The previous prime is 87109408369. The next prime is 87109408453. The reversal of 87109408406 is 60480490178.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21777352100 + ... + 21777352103.

It is an arithmetic number, because the mean of its divisors is an integer number (32666028153).

Almost surely, 2^87109408406 is an apocalyptic number.

87109408406 is a deficient number, since it is larger than the sum of its proper divisors (43554704206).

87109408406 is a wasteful number, since it uses less digits than its factorization.

87109408406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43554704205.

The product of its (nonzero) digits is 387072, while the sum is 47.

The spelling of 87109408406 in words is "eighty-seven billion, one hundred nine million, four hundred eight thousand, four hundred six".