2195639885 has 8 divisors (see below), whose sum is σ = 2637743616. Its totient is φ = 1754528080.

The previous prime is 2195639857. The next prime is 2195639933. The reversal of 2195639885 is 5889365912.

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

It is not a de Polignac number, because 2195639885 - 2¹² = 2195635789 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2195639885.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 243101 + ... + 251970.

It is an arithmetic number, because the mean of its divisors is an integer number (329717952).

Almost surely, 2^2195639885 is an apocalyptic number.

It is an amenable number.

2195639885 is a deficient number, since it is larger than the sum of its proper divisors (442103731).

2195639885 is an equidigital number, since it uses as much as digits as its factorization.

2195639885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495963.

The product of its digits is 4665600, while the sum is 56.

The square root of 2195639885 is about 46857.6555644859. The cubic root of 2195639885 is about 1299.7316773631.

The spelling of 2195639885 in words is "two billion, one hundred ninety-five million, six hundred thirty-nine thousand, eight hundred eighty-five".