6440902673207 has 4 divisors (see below), whose sum is σ = 6458843906640. Its totient is φ = 6422961439776.

The previous prime is 6440902673201. The next prime is 6440902673281. The reversal of 6440902673207 is 7023762090446.

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

It is a cyclic number.

It is not a de Polignac number, because 6440902673207 - 2¹² = 6440902669111 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 (6440902673201) 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, 8970616178 + ... + 8970616895.

It is an arithmetic number, because the mean of its divisors is an integer number (1614710976660).

Almost surely, 2^{6440902673207} is an apocalyptic number.

6440902673207 is a deficient number, since it is larger than the sum of its proper divisors (17941233433).

6440902673207 is a wasteful number, since it uses less digits than its factorization.

6440902673207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17941233432.

The product of its (nonzero) digits is 3048192, while the sum is 50.

The spelling of 6440902673207 in words is "six trillion, four hundred forty billion, nine hundred two million, six hundred seventy-three thousand, two hundred seven".