12605026655661 has 8 divisors (see below), whose sum is σ = 18334584226464. Its totient is φ = 7639410094320.

The previous prime is 12605026655651. The next prime is 12605026655731. The reversal of 12605026655661 is 16655662050621.

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

It is a de Polignac number, because none of the positive numbers 2^k-12605026655661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12605026655651) 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, 190985252326 + ... + 190985252391.

It is an arithmetic number, because the mean of its divisors is an integer number (2291823028308).

Almost surely, 2^{12605026655661} is an apocalyptic number.

12605026655661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12605026655661 is a deficient number, since it is larger than the sum of its proper divisors (5729557570803).

12605026655661 is a wasteful number, since it uses less digits than its factorization.

12605026655661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381970504731.

The product of its (nonzero) digits is 3888000, while the sum is 51.

The spelling of 12605026655661 in words is "twelve trillion, six hundred five billion, twenty-six million, six hundred fifty-five thousand, six hundred sixty-one".