6490668457 has 8 divisors (see below), whose sum is σ = 7988515136. Its totient is φ = 5135473872.

The previous prime is 6490668439. The next prime is 6490668521. The reversal of 6490668457 is 7548660946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6490668457 - 2³¹ = 4343184809 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6490668398 and 6490668407.

It is not an unprimeable number, because it can be changed into a prime (6490668857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35662923 + ... + 35663104.

It is an arithmetic number, because the mean of its divisors is an integer number (998564392).

Almost surely, 2^6490668457 is an apocalyptic number.

It is an amenable number.

6490668457 is a deficient number, since it is larger than the sum of its proper divisors (1497846679).

6490668457 is a wasteful number, since it uses less digits than its factorization.

6490668457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71326047.

The product of its (nonzero) digits is 8709120, while the sum is 55.

The square root of 6490668457 is about 80564.6849245996. The cubic root of 6490668457 is about 1865.3620715041.

The spelling of 6490668457 in words is "six billion, four hundred ninety million, six hundred sixty-eight thousand, four hundred fifty-seven".