2520646842 has 64 divisors (see below), whose sum is σ = 5905557504. Its totient is φ = 702233280.

The previous prime is 2520646841. The next prime is 2520646879. The reversal of 2520646842 is 2486460252.

It is a self number, because there is not a number n which added to its sum of digits gives 2520646842.

It is not an unprimeable number, because it can be changed into a prime (2520646841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1843243 + ... + 1844609.

It is an arithmetic number, because the mean of its divisors is an integer number (92274336).

Almost surely, 2^2520646842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2520646842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2952778752).

2520646842 is an abundant number, since it is smaller than the sum of its proper divisors (3384910662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2520646842 is a wasteful number, since it uses less digits than its factorization.

2520646842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2443.

The product of its (nonzero) digits is 184320, while the sum is 39.

The square root of 2520646842 is about 50206.0438791984. The cubic root of 2520646842 is about 1360.9348463663.

The spelling of 2520646842 in words is "two billion, five hundred twenty million, six hundred forty-six thousand, eight hundred forty-two".