13620444401 has 8 divisors (see below), whose sum is σ = 14215910184. Its totient is φ = 13037514880.

The previous prime is 13620444379. The next prime is 13620444407. The reversal of 13620444401 is 10444402631.

It can be written as a sum of positive squares in 4 ways, for example, as 34210801 + 13586233600 = 5849^2 + 116560^2 .

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-13620444401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13620444407) 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, 3131846 + ... + 3136191.

It is an arithmetic number, because the mean of its divisors is an integer number (1776988773).

Almost surely, 2^13620444401 is an apocalyptic number.

It is an amenable number.

13620444401 is a deficient number, since it is larger than the sum of its proper divisors (595465783).

13620444401 is an equidigital number, since it uses as much as digits as its factorization.

13620444401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6268131.

The product of its (nonzero) digits is 9216, while the sum is 29.

The spelling of 13620444401 in words is "thirteen billion, six hundred twenty million, four hundred forty-four thousand, four hundred one".