12452400261 has 144 divisors (see below), whose sum is σ = 23520107520. Its totient is φ = 6190525440.

The previous prime is 12452400251. The next prime is 12452400293. The reversal of 12452400261 is 16200425421.

It is not a de Polignac number, because 12452400261 - 2⁶ = 12452400197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12452400221) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 17562975 + ... + 17563683.

It is an arithmetic number, because the mean of its divisors is an integer number (163334080).

Almost surely, 2^12452400261 is an apocalyptic number.

It is an amenable number.

12452400261 is a deficient number, since it is larger than the sum of its proper divisors (11067707259).

12452400261 is a wasteful number, since it uses less digits than its factorization.

12452400261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816 (or 790 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 12452400261 its reverse (16200425421), we get a palindrome (28652825682).

The spelling of 12452400261 in words is "twelve billion, four hundred fifty-two million, four hundred thousand, two hundred sixty-one".