2643243077 has 8 divisors (see below), whose sum is σ = 2735006040. Its totient is φ = 2551521280.

The previous prime is 2643243041. The next prime is 2643243143. The reversal of 2643243077 is 7703423462.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 428034721 + 2215208356 = 20689^2 + 47066^2 .

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 2643243077 - 2¹² = 2643238981 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2643243077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2643243677) 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, 180677 + ... + 194757.

It is an arithmetic number, because the mean of its divisors is an integer number (341875755).

Almost surely, 2^2643243077 is an apocalyptic number.

It is an amenable number.

2643243077 is a deficient number, since it is larger than the sum of its proper divisors (91762963).

2643243077 is a wasteful number, since it uses less digits than its factorization.

2643243077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20583.

The product of its (nonzero) digits is 169344, while the sum is 38.

The square root of 2643243077 is about 51412.4797787463. The cubic root of 2643243077 is about 1382.6503496396.

The spelling of 2643243077 in words is "two billion, six hundred forty-three million, two hundred forty-three thousand, seventy-seven".