7780000017857 has 16 divisors (see below), whose sum is σ = 7834642425792. Its totient is φ = 7725589198080.

The previous prime is 7780000017833. The next prime is 7780000017859. The reversal of 7780000017857 is 7587100000877.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7780000017857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7780000017859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118461773 + ... + 118527429.

It is an arithmetic number, because the mean of its divisors is an integer number (489665151612).

Almost surely, 2^{7780000017857} is an apocalyptic number.

It is an amenable number.

7780000017857 is a deficient number, since it is larger than the sum of its proper divisors (54642407935).

7780000017857 is a wasteful number, since it uses less digits than its factorization.

7780000017857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67408.

The product of its (nonzero) digits is 768320, while the sum is 50.

The spelling of 7780000017857 in words is "seven trillion, seven hundred eighty billion, seventeen thousand, eight hundred fifty-seven".