12611883561 has 8 divisors (see below), whose sum is σ = 16817498880. Its totient is φ = 8407095312.

The previous prime is 12611883541. The next prime is 12611883563. The reversal of 12611883561 is 16538811621.

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

It is not a de Polignac number, because 12611883561 - 2¹⁸ = 12611621417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12611883563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170265 + ... + 232838.

It is an arithmetic number, because the mean of its divisors is an integer number (2102187360).

Almost surely, 2^12611883561 is an apocalyptic number.

It is an amenable number.

12611883561 is a deficient number, since it is larger than the sum of its proper divisors (4205615319).

12611883561 is a wasteful number, since it uses less digits than its factorization.

12611883561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413535.

The product of its digits is 69120, while the sum is 42.

The spelling of 12611883561 in words is "twelve billion, six hundred eleven million, eight hundred eighty-three thousand, five hundred sixty-one".