12917504655 has 192 divisors, whose sum is σ = 27398891520. Its totient is φ = 5554483200.

The previous prime is 12917504629. The next prime is 12917504671. The reversal of 12917504655 is 55640571921.

It is a happy number.

12917504655 is a `hidden beast` number, since 1 + 2 + 91 + 7 + 504 + 6 + 55 = 666.

It is not a de Polignac number, because 12917504655 - 2⁶ = 12917504591 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 12917504655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 10492890 + ... + 10494120.

It is an arithmetic number, because the mean of its divisors is an integer number (142702560).

Almost surely, 2^12917504655 is an apocalyptic number.

12917504655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12917504655 is an abundant number, since it is smaller than the sum of its proper divisors (14481386865).

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

12917504655 is a wasteful number, since it uses less digits than its factorization.

12917504655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342 (or 1339 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 45.

The spelling of 12917504655 in words is "twelve billion, nine hundred seventeen million, five hundred four thousand, six hundred fifty-five".