87133939616 has 24 divisors (see below), whose sum is σ = 171717067620.
Its totient is φ = 43523255808.
The previous prime is 87133939591. The next prime is 87133939649. The reversal of 87133939616 is 61693933178.
It is a happy number.
It can be written as a sum of positive squares in 2 ways, for example, as 61999008016 + 25134931600 = 248996^2 + 158540^2
It is an unprimeable number.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1333661 + ... + 1397468.
Almost surely, 287133939616 is an apocalyptic number.
It is an amenable number.
87133939616 is a deficient number, since it is larger than the sum of its proper divisors (84583128004).
87133939616 is a wasteful number, since it uses less digits than its factorization.
87133939616 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2732136 (or 2732128 counting only the distinct ones).
The product of its digits is 4408992, while the sum is 56.
The spelling of 87133939616 in words is "eighty-seven billion, one hundred thirty-three million, nine hundred thirty-nine thousand, six hundred sixteen".