13279773640 has 32 divisors (see below), whose sum is σ = 34147990080. Its totient is φ = 4553065152.

The previous prime is 13279773613. The next prime is 13279773677. The reversal of 13279773640 is 4637797231.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23713602 + ... + 23714161.

It is an arithmetic number, because the mean of its divisors is an integer number (1067124690).

Almost surely, 2^13279773640 is an apocalyptic number.

13279773640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13279773640 is an abundant number, since it is smaller than the sum of its proper divisors (20868216440).

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

13279773640 is a wasteful number, since it uses less digits than its factorization.

13279773640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47427781 (or 47427777 counting only the distinct ones).

The product of its (nonzero) digits is 1333584, while the sum is 49.

The spelling of 13279773640 in words is "thirteen billion, two hundred seventy-nine million, seven hundred seventy-three thousand, six hundred forty".