6435675681 has 4 divisors (see below), whose sum is σ = 8580900912. Its totient is φ = 4290450452.

The previous prime is 6435675677. The next prime is 6435675689. The reversal of 6435675681 is 1865765346.

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 6435675681 - 2² = 6435675677 is a prime.

It is a super-3 number, since 3×6435675681³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (6435675689) 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, 1072612611 + ... + 1072612616.

It is an arithmetic number, because the mean of its divisors is an integer number (2145225228).

Almost surely, 2^6435675681 is an apocalyptic number.

It is an amenable number.

6435675681 is a deficient number, since it is larger than the sum of its proper divisors (2145225231).

6435675681 is a wasteful number, since it uses less digits than its factorization.

6435675681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2145225230.

The product of its digits is 3628800, while the sum is 51.

The square root of 6435675681 is about 80222.6631382928. The cubic root of 6435675681 is about 1860.0789731181.

The spelling of 6435675681 in words is "six billion, four hundred thirty-five million, six hundred seventy-five thousand, six hundred eighty-one".