6490406121 has 4 divisors (see below), whose sum is σ = 8653874832. Its totient is φ = 4326937412.

The previous prime is 6490406119. The next prime is 6490406159. The reversal of 6490406121 is 1216040946.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6490406121 - 2¹ = 6490406119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6490406191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1081734351 + ... + 1081734356.

It is an arithmetic number, because the mean of its divisors is an integer number (2163468708).

Almost surely, 2^6490406121 is an apocalyptic number.

It is an amenable number.

6490406121 is a deficient number, since it is larger than the sum of its proper divisors (2163468711).

6490406121 is a wasteful number, since it uses less digits than its factorization.

6490406121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2163468710.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 6490406121 is about 80563.0568002481. The cubic root of 6490406121 is about 1865.3369401317.

The spelling of 6490406121 in words is "six billion, four hundred ninety million, four hundred six thousand, one hundred twenty-one".