12565002061 has 16 divisors (see below), whose sum is σ = 13005538560. Its totient is φ = 12134491200.

The previous prime is 12565002053. The next prime is 12565002091. The reversal of 12565002061 is 16020056521.

It is a cyclic number.

It is not a de Polignac number, because 12565002061 - 2³ = 12565002053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12565002001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 652771 + ... + 671743.

It is an arithmetic number, because the mean of its divisors is an integer number (812846160).

Almost surely, 2^12565002061 is an apocalyptic number.

It is an amenable number.

12565002061 is a deficient number, since it is larger than the sum of its proper divisors (440536499).

12565002061 is a wasteful number, since it uses less digits than its factorization.

12565002061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19236.

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 12565002061 its reverse (16020056521), we get a palindrome (28585058582).

The spelling of 12565002061 in words is "twelve billion, five hundred sixty-five million, two thousand, sixty-one".