2117591444 has 12 divisors (see below), whose sum is σ = 3717858144. Its totient is φ = 1055346264.

The previous prime is 2117591423. The next prime is 2117591447. The reversal of 2117591444 is 4441957112.

It is a junction number, because it is equal to n+sod(n) for n = 2117591398 and 2117591407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2117591447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 860984 + ... + 863439.

It is an arithmetic number, because the mean of its divisors is an integer number (309821512).

Almost surely, 2^2117591444 is an apocalyptic number.

It is an amenable number.

2117591444 is a deficient number, since it is larger than the sum of its proper divisors (1600266700).

2117591444 is a wasteful number, since it uses less digits than its factorization.

2117591444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1724734 (or 1724732 counting only the distinct ones).

The product of its digits is 40320, while the sum is 38.

The square root of 2117591444 is about 46017.2950530559. The cubic root of 2117591444 is about 1284.1449785022.

The spelling of 2117591444 in words is "two billion, one hundred seventeen million, five hundred ninety-one thousand, four hundred forty-four".