2528678813 has 16 divisors (see below), whose sum is σ = 2644197696. Its totient is φ = 2415903360.

The previous prime is 2528678791. The next prime is 2528678849. The reversal of 2528678813 is 3188768252.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2528678813 - 2⁶ = 2528678749 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 (2528678513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1970270 + ... + 1971552.

It is an arithmetic number, because the mean of its divisors is an integer number (165262356).

Almost surely, 2^2528678813 is an apocalyptic number.

It is an amenable number.

2528678813 is a deficient number, since it is larger than the sum of its proper divisors (115518883).

2528678813 is a wasteful number, since it uses less digits than its factorization.

2528678813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2284.

The product of its digits is 1290240, while the sum is 50.

The square root of 2528678813 is about 50285.9703396484. The cubic root of 2528678813 is about 1362.3788407035.

The spelling of 2528678813 in words is "two billion, five hundred twenty-eight million, six hundred seventy-eight thousand, eight hundred thirteen".