2780605217708 has 24 divisors (see below), whose sum is σ = 4940829006960. Its totient is φ = 1369096292160.

The previous prime is 2780605217707. The next prime is 2780605217711. The reversal of 2780605217708 is 8077125060872.

It is a self number, because there is not a number n which added to its sum of digits gives 2780605217708.

It is not an unprimeable number, because it can be changed into a prime (2780605217707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19491923 + ... + 19634058.

It is an arithmetic number, because the mean of its divisors is an integer number (205867875290).

Almost surely, 2^{2780605217708} is an apocalyptic number.

It is an amenable number.

2780605217708 is a deficient number, since it is larger than the sum of its proper divisors (2160223789252).

2780605217708 is a wasteful number, since it uses less digits than its factorization.

2780605217708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39126257 (or 39126255 counting only the distinct ones).

The product of its (nonzero) digits is 2634240, while the sum is 53.

The spelling of 2780605217708 in words is "two trillion, seven hundred eighty billion, six hundred five million, two hundred seventeen thousand, seven hundred eight".