2563561542 has 16 divisors (see below), whose sum is σ = 5141651760. Its totient is φ = 852099072.

The previous prime is 2563561499. The next prime is 2563561543. The reversal of 2563561542 is 2451653652.

It is a self number, because there is not a number n which added to its sum of digits gives 2563561542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2563561543) 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, 603067 + ... + 607302.

It is an arithmetic number, because the mean of its divisors is an integer number (321353235).

Almost surely, 2^2563561542 is an apocalyptic number.

2563561542 is an abundant number, since it is smaller than the sum of its proper divisors (2578090218).

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

2563561542 is a wasteful number, since it uses less digits than its factorization.

2563561542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210727.

The product of its digits is 216000, while the sum is 39.

The square root of 2563561542 is about 50631.6259071344. The cubic root of 2563561542 is about 1368.6148541197.

The spelling of 2563561542 in words is "two billion, five hundred sixty-three million, five hundred sixty-one thousand, five hundred forty-two".