12561972035 has 8 divisors (see below), whose sum is σ = 15075192336. Its totient is φ = 10049027040.

The previous prime is 12561972011. The next prime is 12561972067. The reversal of 12561972035 is 53027916521.

12561972035 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12561972035 - 2²² = 12557777731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12561971983 and 12561972001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50312 + ... + 166298.

It is an arithmetic number, because the mean of its divisors is an integer number (1884399042).

Almost surely, 2^12561972035 is an apocalyptic number.

12561972035 is a deficient number, since it is larger than the sum of its proper divisors (2513220301).

12561972035 is a wasteful number, since it uses less digits than its factorization.

12561972035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137653.

The product of its (nonzero) digits is 113400, while the sum is 41.

The spelling of 12561972035 in words is "twelve billion, five hundred sixty-one million, nine hundred seventy-two thousand, thirty-five".