12954665556 has 384 divisors, whose sum is σ = 40959959040. Its totient is φ = 3464487936.

The previous prime is 12954665543. The next prime is 12954665561. The reversal of 12954665556 is 65556645921.

It is a happy number.

12954665556 is a `hidden beast` number, since 1 + 29 + 5 + 4 + 6 + 65 + 556 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 125773401 + ... + 125773503.

It is an arithmetic number, because the mean of its divisors is an integer number (106666560).

Almost surely, 2^12954665556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12954665556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20479979520).

12954665556 is an abundant number, since it is smaller than the sum of its proper divisors (28005293484).

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

12954665556 is a wasteful number, since it uses less digits than its factorization.

12954665556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 284 counting only the distinct ones).

The product of its digits is 9720000, while the sum is 54.

The spelling of 12954665556 in words is "twelve billion, nine hundred fifty-four million, six hundred sixty-five thousand, five hundred fifty-six".