2457720013 has 4 divisors (see below), whose sum is σ = 2808822880. Its totient is φ = 2106617148.

The previous prime is 2457720007. The next prime is 2457720017. The reversal of 2457720013 is 3100277542.

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 2457720013 - 2²⁹ = 1920849101 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 (2457720017) 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, 175551423 + ... + 175551436.

It is an arithmetic number, because the mean of its divisors is an integer number (702205720).

Almost surely, 2^2457720013 is an apocalyptic number.

It is an amenable number.

2457720013 is a deficient number, since it is larger than the sum of its proper divisors (351102867).

2457720013 is an equidigital number, since it uses as much as digits as its factorization.

2457720013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351102866.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 2457720013 is about 49575.3972550902. The cubic root of 2457720013 is about 1349.5142308970.

Adding to 2457720013 its reverse (3100277542), we get a palindrome (5557997555).

The spelling of 2457720013 in words is "two billion, four hundred fifty-seven million, seven hundred twenty thousand, thirteen".