652818891 has 16 divisors (see below), whose sum is σ = 918397440. Its totient is φ = 411334560.

The previous prime is 652818869. The next prime is 652818899. The reversal of 652818891 is 198818256.

It is not a de Polignac number, because 652818891 - 2²¹ = 650721739 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 652818891.

It is not an unprimeable number, because it can be changed into a prime (652818899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11281 + ... + 37853.

It is an arithmetic number, because the mean of its divisors is an integer number (57399840).

Almost surely, 2^652818891 is an apocalyptic number.

652818891 is a deficient number, since it is larger than the sum of its proper divisors (265578549).

652818891 is a wasteful number, since it uses less digits than its factorization.

652818891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27026.

The product of its digits is 276480, while the sum is 48.

The square root of 652818891 is about 25550.3207611959. The cubic root of 652818891 is about 867.4895218638.

The spelling of 652818891 in words is "six hundred fifty-two million, eight hundred eighteen thousand, eight hundred ninety-one".