697977779796 has 72 divisors (see below), whose sum is σ = 1946352844800. Its totient is φ = 209131908480.

The previous prime is 697977779791. The next prime is 697977779809.

697977779796 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (697977779791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9866836 + ... + 9937323.

It is an arithmetic number, because the mean of its divisors is an integer number (27032678400).

Almost surely, 2^697977779796 is an apocalyptic number.

697977779796 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

697977779796 is an abundant number, since it is smaller than the sum of its proper divisors (1248375065004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

697977779796 is a wasteful number, since it uses less digits than its factorization.

697977779796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19804269 (or 19804264 counting only the distinct ones).

The product of its digits is 27788223204, while the sum is 90.

The spelling of 697977779796 in words is "six hundred ninety-seven billion, nine hundred seventy-seven million, seven hundred seventy-nine thousand, seven hundred ninety-six".