12655735974 has 108 divisors (see below), whose sum is σ = 33124451724. Its totient is φ = 3615924564.

The previous prime is 12655735909. The next prime is 12655735987. The reversal of 12655735974 is 47953755621.

It is a happy number.

12655735974 is a `hidden beast` number, since 1 + 2 + 65 + 573 + 5 + 9 + 7 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

Its product of digits (7938000) is a multiple of the sum of its prime divisors (12).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12655735974.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 1807962279 + ... + 1807962285.

Almost surely, 2^12655735974 is an apocalyptic number.

12655735974 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12655735974, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16562225862).

12655735974 is an abundant number, since it is smaller than the sum of its proper divisors (20468715750).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12655735974 is an frugal number, since it uses more digits than its factorization.

12655735974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67 (or 12 counting only the distinct ones).

The product of its digits is 7938000, while the sum is 54.

Multiplying 12655735974 by its sum of digits (54), we get a square (683409742596 = 826686²).

12655735974 divided by its sum of digits (54) gives a square (234365481 = 15309²).

The spelling of 12655735974 in words is "twelve billion, six hundred fifty-five million, seven hundred thirty-five thousand, nine hundred seventy-four".