2543685013 has 4 divisors (see below), whose sum is σ = 2568381088. Its totient is φ = 2518988940.

The previous prime is 2543684987. The next prime is 2543685041. The reversal of 2543685013 is 3105863452.

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 2543685013 - 2⁹ = 2543684501 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 (2543685913) 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, 12347883 + ... + 12348088.

It is an arithmetic number, because the mean of its divisors is an integer number (642095272).

Almost surely, 2^2543685013 is an apocalyptic number.

It is an amenable number.

2543685013 is a deficient number, since it is larger than the sum of its proper divisors (24696075).

2543685013 is a wasteful number, since it uses less digits than its factorization.

2543685013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24696074.

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 2543685013 is about 50434.9582432661. The cubic root of 2543685013 is about 1365.0684957153.

The spelling of 2543685013 in words is "two billion, five hundred forty-three million, six hundred eighty-five thousand, thirteen".