8201878505 has 8 divisors (see below), whose sum is σ = 9842756352. Its totient is φ = 6561168048.

The previous prime is 8201878483. The next prime is 8201878511. The reversal of 8201878505 is 5058781028.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8201878505 - 2⁶ = 8201878441 is a prime.

It is a super-2 number, since 2×8201878505² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130454 + ... + 182816.

It is an arithmetic number, because the mean of its divisors is an integer number (1230344544).

Almost surely, 2^8201878505 is an apocalyptic number.

It is an amenable number.

8201878505 is a deficient number, since it is larger than the sum of its proper divisors (1640877847).

8201878505 is a wasteful number, since it uses less digits than its factorization.

8201878505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83695.

The product of its (nonzero) digits is 179200, while the sum is 44.

The square root of 8201878505 is about 90564.2230960990. The cubic root of 8201878505 is about 2016.6836496836.

The spelling of 8201878505 in words is "eight billion, two hundred one million, eight hundred seventy-eight thousand, five hundred five".