6442723156613 has 8 divisors (see below), whose sum is σ = 6450036383448. Its totient is φ = 6435412555264.

The previous prime is 6442723156591. The next prime is 6442723156633. The reversal of 6442723156613 is 3166513272446.

It can be written as a sum of positive squares in 4 ways, for example, as 2209141197124 + 4233581959489 = 1486318^2 + 2057567^2 .

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 6442723156613 - 2¹⁸ = 6442722894469 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 (6442723156633) 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, 4275245 + ... + 5582397.

It is an arithmetic number, because the mean of its divisors is an integer number (806254547931).

Almost surely, 2^{6442723156613} is an apocalyptic number.

It is an amenable number.

6442723156613 is a deficient number, since it is larger than the sum of its proper divisors (7313226835).

6442723156613 is a wasteful number, since it uses less digits than its factorization.

6442723156613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312743.

The product of its digits is 4354560, while the sum is 50.

The spelling of 6442723156613 in words is "six trillion, four hundred forty-two billion, seven hundred twenty-three million, one hundred fifty-six thousand, six hundred thirteen".