13616725428 has 48 divisors (see below), whose sum is σ = 35342939520. Its totient is φ = 4533724800.

The previous prime is 13616725411. The next prime is 13616725457. The reversal of 13616725428 is 82452761631.

13616725428 is a `hidden beast` number, since 1 + 3 + 616 + 7 + 2 + 5 + 4 + 28 = 666.

It is a super-2 number, since 2×13616725428² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23593 + ... + 166703.

It is an arithmetic number, because the mean of its divisors is an integer number (736311240).

Almost surely, 2^13616725428 is an apocalyptic number.

13616725428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

13616725428 is an abundant number, since it is smaller than the sum of its proper divisors (21726214092).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13616725428 is a wasteful number, since it uses less digits than its factorization.

13616725428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144005 (or 143997 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The spelling of 13616725428 in words is "thirteen billion, six hundred sixteen million, seven hundred twenty-five thousand, four hundred twenty-eight".