2195849664 has 84 divisors (see below), whose sum is σ = 6305869024. Its totient is φ = 730570752.

The previous prime is 2195849647. The next prime is 2195849683. The reversal of 2195849664 is 4669485912.

2195849664 is a `hidden beast` number, since 2 + 1 + 95 + 8 + 496 + 64 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 2195849664.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 329049 + ... + 335655.

Almost surely, 2^2195849664 is an apocalyptic number.

2195849664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2195849664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3152934512).

2195849664 is an abundant number, since it is smaller than the sum of its proper divisors (4110019360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2195849664 is a wasteful number, since it uses less digits than its factorization.

2195849664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7202 (or 7189 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The square root of 2195849664 is about 46859.8939819543. The cubic root of 2195849664 is about 1299.7730696592.

The spelling of 2195849664 in words is "two billion, one hundred ninety-five million, eight hundred forty-nine thousand, six hundred sixty-four".