6738449121 has 6 divisors (see below), whose sum is σ = 9733315410. Its totient is φ = 4492299408.

The previous prime is 6738449111. The next prime is 6738449147. The reversal of 6738449121 is 1219448376.

6738449121 is a `hidden beast` number, since 67 + 3 + 84 + 491 + 21 = 666.

6738449121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 3826659600 + 2911789521 = 61860^2 + 53961^2 .

It is not a de Polignac number, because 6738449121 - 2⁷ = 6738448993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6738449101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 374358276 + ... + 374358293.

It is an arithmetic number, because the mean of its divisors is an integer number (1622219235).

Almost surely, 2^6738449121 is an apocalyptic number.

It is an amenable number.

6738449121 is a deficient number, since it is larger than the sum of its proper divisors (2994866289).

6738449121 is a wasteful number, since it uses less digits than its factorization.

6738449121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748716575 (or 748716572 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 6738449121 is about 82088.0571155147. The cubic root of 6738449121 is about 1888.8029448541.

The spelling of 6738449121 in words is "six billion, seven hundred thirty-eight million, four hundred forty-nine thousand, one hundred twenty-one".