12207251561 has 8 divisors (see below), whose sum is σ = 12639084480. Its totient is φ = 11776144912.

The previous prime is 12207251543. The next prime is 12207251593. The reversal of 12207251561 is 16515270221.

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

It is a cyclic number.

It is not a de Polignac number, because 12207251561 - 2¹⁴ = 12207235177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12207253561) 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, 147245 + ... + 214698.

It is an arithmetic number, because the mean of its divisors is an integer number (1579885560).

Almost surely, 2^12207251561 is an apocalyptic number.

It is an amenable number.

12207251561 is a deficient number, since it is larger than the sum of its proper divisors (431832919).

12207251561 is a wasteful number, since it uses less digits than its factorization.

12207251561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363135.

The product of its (nonzero) digits is 8400, while the sum is 32.

The spelling of 12207251561 in words is "twelve billion, two hundred seven million, two hundred fifty-one thousand, five hundred sixty-one".