2504496781 has 2 divisors, whose sum is σ = 2504496782. Its totient is φ = 2504496780.

The previous prime is 2504496779. The next prime is 2504496791. The reversal of 2504496781 is 1876944052.

2504496781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2137582756 + 366914025 = 46234^2 + 19155^2 .

It is a cyclic number.

It is not a de Polignac number, because 2504496781 - 2¹ = 2504496779 is a prime.

It is a super-2 number, since 2×2504496781² = 12545008252078723922, which contains 22 as substring.

Together with 2504496779, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2504496791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1252248390 + 1252248391.

It is an arithmetic number, because the mean of its divisors is an integer number (1252248391).

Almost surely, 2^2504496781 is an apocalyptic number.

It is an amenable number.

2504496781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2504496781 is an equidigital number, since it uses as much as digits as its factorization.

2504496781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 46.

The square root of 2504496781 is about 50044.9476071261. The cubic root of 2504496781 is about 1358.0220636590.

The spelling of 2504496781 in words is "two billion, five hundred four million, four hundred ninety-six thousand, seven hundred eighty-one".