2780863916697 has 24 divisors (see below), whose sum is σ = 4032945387744. Its totient is φ = 1846471261824.

The previous prime is 2780863916641. The next prime is 2780863916723. The reversal of 2780863916697 is 7966193680872.

2780863916697 is a `hidden beast` number, since 2 + 78 + 0 + 86 + 391 + 6 + 6 + 97 = 666.

It is not a de Polignac number, because 2780863916697 - 2²² = 2780859722393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2780863916617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2253393 + ... + 3261825.

It is an arithmetic number, because the mean of its divisors is an integer number (168039391156).

Almost surely, 2^{2780863916697} is an apocalyptic number.

It is an amenable number.

2780863916697 is a deficient number, since it is larger than the sum of its proper divisors (1252081471047).

2780863916697 is a wasteful number, since it uses less digits than its factorization.

2780863916697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009669 (or 1009666 counting only the distinct ones).

The product of its (nonzero) digits is 329204736, while the sum is 72.

The spelling of 2780863916697 in words is "two trillion, seven hundred eighty billion, eight hundred sixty-three million, nine hundred sixteen thousand, six hundred ninety-seven".