2620785643768 has 16 divisors (see below), whose sum is σ = 4914016125480. Its totient is φ = 1310381343648.

The previous prime is 2620785643703. The next prime is 2620785643771. The reversal of 2620785643768 is 8673465870262.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 422371 + ... + 2328082.

Almost surely, 2^{2620785643768} is an apocalyptic number.

It is an amenable number.

2620785643768 is a deficient number, since it is larger than the sum of its proper divisors (2293230481712).

2620785643768 is a wasteful number, since it uses less digits than its factorization.

2620785643768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2869566 (or 2869562 counting only the distinct ones).

The product of its (nonzero) digits is 162570240, while the sum is 64.

The spelling of 2620785643768 in words is "two trillion, six hundred twenty billion, seven hundred eighty-five million, six hundred forty-three thousand, seven hundred sixty-eight".