1878768647217 has 224 divisors, whose sum is σ = 3552022656000. Its totient is φ = 964909998720.

The previous prime is 1878768647183. The next prime is 1878768647219. The reversal of 1878768647217 is 7127468678781.

1878768647217 is a `hidden beast` number, since 1 + 8 + 7 + 8 + 76 + 86 + 472 + 1 + 7 = 666.

It is not a de Polignac number, because 1878768647217 - 2¹² = 1878768643121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1878768647219) by changing a digit.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 3035167134 + ... + 3035167752.

It is an arithmetic number, because the mean of its divisors is an integer number (15857244000).

Almost surely, 2^{1878768647217} is an apocalyptic number.

It is an amenable number.

1878768647217 is a deficient number, since it is larger than the sum of its proper divisors (1673254008783).

1878768647217 is a wasteful number, since it uses less digits than its factorization.

1878768647217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183 (or 1168 counting only the distinct ones).

The product of its digits is 354041856, while the sum is 72.

The spelling of 1878768647217 in words is "one trillion, eight hundred seventy-eight billion, seven hundred sixty-eight million, six hundred forty-seven thousand, two hundred seventeen".