2116490405 has 4 divisors (see below), whose sum is σ = 2539788492. Its totient is φ = 1693192320.

The previous prime is 2116490357. The next prime is 2116490407. The reversal of 2116490405 is 5040946112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1065304321 + 1051186084 = 32639^2 + 32422^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2116490405 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2116490407) 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, 211649036 + ... + 211649045.

It is an arithmetic number, because the mean of its divisors is an integer number (634947123).

Almost surely, 2^2116490405 is an apocalyptic number.

It is an amenable number.

2116490405 is a deficient number, since it is larger than the sum of its proper divisors (423298087).

2116490405 is an equidigital number, since it uses as much as digits as its factorization.

2116490405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423298086.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 2116490405 is about 46005.3301803171. The cubic root of 2116490405 is about 1283.9223767300.

The spelling of 2116490405 in words is "two billion, one hundred sixteen million, four hundred ninety thousand, four hundred five".