13679779477 has 16 divisors (see below), whose sum is σ = 17180262400.
Its totient is φ = 10823558256.
The previous prime is 13679779459. The next prime is 13679779489. The reversal of 13679779477 is 77497797631.
It is a happy number.
It is not a de Polignac number, because 13679779477 - 27 = 13679779349 is a prime.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (13679779427) 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 15 ways as a sum of consecutive naturals, for example, 1529493 + ... + 1538410.
It is an arithmetic number, because the mean of its divisors is an integer number (1073766400).
Almost surely, 213679779477 is an apocalyptic number.
It is an amenable number.
13679779477 is a deficient number, since it is larger than the sum of its proper divisors (3500482923).
13679779477 is an equidigital number, since it uses as much as digits as its factorization.
13679779477 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3067937 (or 3067923 counting only the distinct ones).
The product of its digits is 98018424, while the sum is 67.
The spelling of 13679779477 in words is "thirteen billion, six hundred seventy-nine million, seven hundred seventy-nine thousand, four hundred seventy-seven".