7785819896697 has 24 divisors (see below), whose sum is σ = 11838464601600. Its totient is φ = 4917203804448.

The previous prime is 7785819896693. The next prime is 7785819896753. The reversal of 7785819896697 is 7966989185877.

It is a happy number.

It is not a de Polignac number, because 7785819896697 - 2² = 7785819896693 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7785819896693) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4801704 + ... + 6215142.

It is an arithmetic number, because the mean of its divisors is an integer number (493269358400).

Almost surely, 2^{7785819896697} is an apocalyptic number.

It is an amenable number.

7785819896697 is a deficient number, since it is larger than the sum of its proper divisors (4052644704903).

7785819896697 is a wasteful number, since it uses less digits than its factorization.

7785819896697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445677 (or 1445674 counting only the distinct ones).

The product of its digits is 23044331520, while the sum is 90.

The spelling of 7785819896697 in words is "seven trillion, seven hundred eighty-five billion, eight hundred nineteen million, eight hundred ninety-six thousand, six hundred ninety-seven".