2195891544 has 96 divisors (see below), whose sum is σ = 6896252160. Its totient is φ = 570356160.

The previous prime is 2195891543. The next prime is 2195891623. The reversal of 2195891544 is 4451985912.

It is a junction number, because it is equal to n+sod(n) for n = 2195891493 and 2195891502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2195891543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33684 + ... + 74339.

It is an arithmetic number, because the mean of its divisors is an integer number (71835960).

Almost surely, 2^2195891544 is an apocalyptic number.

2195891544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2195891544 is an abundant number, since it is smaller than the sum of its proper divisors (4700360616).

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

2195891544 is a wasteful number, since it uses less digits than its factorization.

2195891544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108061 (or 108046 counting only the distinct ones).

The product of its digits is 518400, while the sum is 48.

The square root of 2195891544 is about 46860.3408438308. The cubic root of 2195891544 is about 1299.7813328463.

The spelling of 2195891544 in words is "two billion, one hundred ninety-five million, eight hundred ninety-one thousand, five hundred forty-four".