13721468785 has 8 divisors (see below), whose sum is σ = 16466927400. Its totient is φ = 10976398464.

The previous prime is 13721468711. The next prime is 13721468807. The reversal of 13721468785 is 58786412731.

It can be written as a sum of positive squares in 4 ways, for example, as 1370258289 + 12351210496 = 37017^2 + 111136^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13721468785 is a prime.

It is a super-3 number, since 3×13721468785³ (a number of 31 digits) contains 333 as substring.

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, 12652 + ... + 166141.

It is an arithmetic number, because the mean of its divisors is an integer number (2058365925).

Almost surely, 2^13721468785 is an apocalyptic number.

It is an amenable number.

13721468785 is a deficient number, since it is larger than the sum of its proper divisors (2745458615).

13721468785 is a wasteful number, since it uses less digits than its factorization.

13721468785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194147.

The product of its digits is 2257920, while the sum is 52.

The spelling of 13721468785 in words is "thirteen billion, seven hundred twenty-one million, four hundred sixty-eight thousand, seven hundred eighty-five".