12561362061 has 8 divisors (see below), whose sum is σ = 17629981920. Its totient is φ = 7933491792.

The previous prime is 12561362041. The next prime is 12561362063. The reversal of 12561362061 is 16026316521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12561362061 - 2¹³ = 12561353869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12561362063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110187330 + ... + 110187443.

It is an arithmetic number, because the mean of its divisors is an integer number (2203747740).

Almost surely, 2^12561362061 is an apocalyptic number.

It is an amenable number.

12561362061 is a deficient number, since it is larger than the sum of its proper divisors (5068619859).

12561362061 is a wasteful number, since it uses less digits than its factorization.

12561362061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220374795.

The product of its (nonzero) digits is 12960, while the sum is 33.

Adding to 12561362061 its reverse (16026316521), we get a palindrome (28587678582).

The spelling of 12561362061 in words is "twelve billion, five hundred sixty-one million, three hundred sixty-two thousand, sixty-one".