12358732661 has 4 divisors (see below), whose sum is σ = 13482253824. Its totient is φ = 11235211500.

The previous prime is 12358732651. The next prime is 12358732667. The reversal of 12358732661 is 16623785321.

12358732661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12358732661 - 2³⁰ = 11284990837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12358732667) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 561760565 + ... + 561760586.

It is an arithmetic number, because the mean of its divisors is an integer number (3370563456).

Almost surely, 2^12358732661 is an apocalyptic number.

12358732661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12358732661 is a deficient number, since it is larger than the sum of its proper divisors (1123521163).

12358732661 is a wasteful number, since it uses less digits than its factorization.

12358732661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123521162.

The product of its digits is 362880, while the sum is 44.

The spelling of 12358732661 in words is "twelve billion, three hundred fifty-eight million, seven hundred thirty-two thousand, six hundred sixty-one".