2565145236556 has 24 divisors (see below), whose sum is σ = 5432072266656. Its totient is φ = 1034680431360.

The previous prime is 2565145236529. The next prime is 2565145236557. The reversal of 2565145236556 is 6556325415652.

It is a super-2 number, since 2×2565145236556² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2565145236497 and 2565145236506.

It is not an unprimeable number, because it can be changed into a prime (2565145236557) 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, 2694479815 + ... + 2694480766.

It is an arithmetic number, because the mean of its divisors is an integer number (226336344444).

Almost surely, 2^{2565145236556} is an apocalyptic number.

It is an amenable number.

2565145236556 is an abundant number, since it is smaller than the sum of its proper divisors (2866927030100).

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

2565145236556 is a wasteful number, since it uses less digits than its factorization.

2565145236556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5388960609 (or 5388960607 counting only the distinct ones).

The product of its digits is 32400000, while the sum is 55.

The spelling of 2565145236556 in words is "two trillion, five hundred sixty-five billion, one hundred forty-five million, two hundred thirty-six thousand, five hundred fifty-six".