13758439681 has 8 divisors (see below), whose sum is σ = 15730565120. Its totient is φ = 11787972768.

The previous prime is 13758439661. The next prime is 13758439703. The reversal of 13758439681 is 18693485731.

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

It is a cyclic number.

It is not a de Polignac number, because 13758439681 - 2⁵ = 13758439649 is a prime.

It is a super-2 number, since 2×13758439681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13758439661) 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, 396801 + ... + 430078.

It is an arithmetic number, because the mean of its divisors is an integer number (1966320640).

Almost surely, 2^13758439681 is an apocalyptic number.

It is an amenable number.

13758439681 is a deficient number, since it is larger than the sum of its proper divisors (1972125439).

13758439681 is an equidigital number, since it uses as much as digits as its factorization.

13758439681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829263.

The product of its digits is 4354560, while the sum is 55.

The spelling of 13758439681 in words is "thirteen billion, seven hundred fifty-eight million, four hundred thirty-nine thousand, six hundred eighty-one".