13621024872 has 192 divisors, whose sum is σ = 45471404160. Its totient is φ = 3586982400.

The previous prime is 13621024853. The next prime is 13621024909. The reversal of 13621024872 is 27842012631.

It is a happy number.

13621024872 is a `hidden beast` number, since 1 + 3 + 621 + 0 + 24 + 8 + 7 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6360922 + ... + 6363062.

It is an arithmetic number, because the mean of its divisors is an integer number (236830230).

Almost surely, 2^13621024872 is an apocalyptic number.

13621024872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13621024872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22735702080).

13621024872 is an abundant number, since it is smaller than the sum of its proper divisors (31850379288).

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

13621024872 is a wasteful number, since it uses less digits than its factorization.

13621024872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3144 (or 3137 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The spelling of 13621024872 in words is "thirteen billion, six hundred twenty-one million, twenty-four thousand, eight hundred seventy-two".