13689014778 has 24 divisors (see below), whose sum is σ = 31220560800. Its totient is φ = 4322846664.

The previous prime is 13689014761. The next prime is 13689014821. The reversal of 13689014778 is 87741098631.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20012838 + ... + 20013521.

It is an arithmetic number, because the mean of its divisors is an integer number (1300856700).

Almost surely, 2^13689014778 is an apocalyptic number.

13689014778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13689014778 is an abundant number, since it is smaller than the sum of its proper divisors (17531546022).

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

13689014778 is a wasteful number, since it uses less digits than its factorization.

13689014778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40026386 (or 40026383 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 54.

The spelling of 13689014778 in words is "thirteen billion, six hundred eighty-nine million, fourteen thousand, seven hundred seventy-eight".