997776383677799 has 24 divisors (see below), whose sum is σ = 1101938787175296. Its totient is φ = 902761025720400.

The previous prime is 997776383677673. The next prime is 997776383677861.

997776383677799 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 997776383677799 - 2³² = 997772088710503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997776383617799) 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, 3795383612 + ... + 3795646494.

It is an arithmetic number, because the mean of its divisors is an integer number (45914116132304).

Almost surely, 2^{997776383677799} is an apocalyptic number.

997776383677799 is a deficient number, since it is larger than the sum of its proper divisors (104162403497497).

997776383677799 is a wasteful number, since it uses less digits than its factorization.

997776383677799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411779 (or 411768 counting only the distinct ones).

The product of its digits is 2000752070688, while the sum is 104.

The spelling of 997776383677799 in words is "nine hundred ninety-seven trillion, seven hundred seventy-six billion, three hundred eighty-three million, six hundred seventy-seven thousand, seven hundred ninety-nine".