2565642102 has 16 divisors (see below), whose sum is σ = 5136188400. Its totient is φ = 854396672.

The previous prime is 2565642089. The next prime is 2565642103. The reversal of 2565642102 is 2012465652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2565642103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197523 + ... + 210110.

It is an arithmetic number, because the mean of its divisors is an integer number (321011775).

Almost surely, 2^2565642102 is an apocalyptic number.

2565642102 is an abundant number, since it is smaller than the sum of its proper divisors (2570546298).

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

2565642102 is a wasteful number, since it uses less digits than its factorization.

2565642102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408687.

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 2565642102 is about 50652.1677917145. The cubic root of 2565642102 is about 1368.9850052151.

The spelling of 2565642102 in words is "two billion, five hundred sixty-five million, six hundred forty-two thousand, one hundred two".