13720778889 has 8 divisors (see below), whose sum is σ = 18294916992. Its totient is φ = 9146913360.

The previous prime is 13720778867. The next prime is 13720778893. The reversal of 13720778889 is 98887702731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13720778889 - 2¹³ = 13720770697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13720778809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141127 + ... + 217619.

It is an arithmetic number, because the mean of its divisors is an integer number (2286864624).

Almost surely, 2^13720778889 is an apocalyptic number.

It is an amenable number.

13720778889 is a deficient number, since it is larger than the sum of its proper divisors (4574138103).

13720778889 is an equidigital number, since it uses as much as digits as its factorization.

13720778889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136287.

The product of its (nonzero) digits is 9483264, while the sum is 60.

The spelling of 13720778889 in words is "thirteen billion, seven hundred twenty million, seven hundred seventy-eight thousand, eight hundred eighty-nine".