12561395470 has 32 divisors (see below), whose sum is σ = 24363888192. Its totient is φ = 4635366912.

The previous prime is 12561395461. The next prime is 12561395471. The reversal of 12561395470 is 7459316521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12561395471) 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, 204694 + ... + 258886.

It is an arithmetic number, because the mean of its divisors is an integer number (761371506).

Almost surely, 2^12561395470 is an apocalyptic number.

12561395470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12561395470 is a deficient number, since it is larger than the sum of its proper divisors (11802492722).

12561395470 is a wasteful number, since it uses less digits than its factorization.

12561395470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55996.

The product of its (nonzero) digits is 226800, while the sum is 43.

The spelling of 12561395470 in words is "twelve billion, five hundred sixty-one million, three hundred ninety-five thousand, four hundred seventy".