2565163542 has 16 divisors (see below), whose sum is σ = 5132671920. Its totient is φ = 854663712.

The previous prime is 2565163511. The next prime is 2565163567. The reversal of 2565163542 is 2453615652.

It is a self number, because there is not a number n which added to its sum of digits gives 2565163542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83317 + ... + 109872.

It is an arithmetic number, because the mean of its divisors is an integer number (320791995).

Almost surely, 2^2565163542 is an apocalyptic number.

2565163542 is an abundant number, since it is smaller than the sum of its proper divisors (2567508378).

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

2565163542 is a wasteful number, since it uses less digits than its factorization.

2565163542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195407.

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

The square root of 2565163542 is about 50647.4435880035. The cubic root of 2565163542 is about 1368.8998826381.

The spelling of 2565163542 in words is "two billion, five hundred sixty-five million, one hundred sixty-three thousand, five hundred forty-two".