13857621407 has 8 divisors (see below), whose sum is σ = 15866560032. Its totient is φ = 11856002400.

The previous prime is 13857621403. The next prime is 13857621419. The reversal of 13857621407 is 70412675831.

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 13857621407 - 2² = 13857621403 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13857621403) 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, 1825844 + ... + 1833417.

It is an arithmetic number, because the mean of its divisors is an integer number (1983320004).

Almost surely, 2^13857621407 is an apocalyptic number.

13857621407 is a deficient number, since it is larger than the sum of its proper divisors (2008938625).

13857621407 is an equidigital number, since it uses as much as digits as its factorization.

13857621407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3659809.

The product of its (nonzero) digits is 282240, while the sum is 44.

The spelling of 13857621407 in words is "thirteen billion, eight hundred fifty-seven million, six hundred twenty-one thousand, four hundred seven".