13894888644 has 324 divisors, whose sum is σ = 44712105984. Its totient is φ = 3625824384.

The previous prime is 13894888607. The next prime is 13894888649. The reversal of 13894888644 is 44688849831.

13894888644 is a `hidden beast` number, since 1 + 38 + 9 + 488 + 86 + 44 = 666.

It is a super-5 number, since 5×13894888644⁵ (a number of 52 digits) contains 55555 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (13894888649) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 37860549 + ... + 37860915.

Almost surely, 2^13894888644 is an apocalyptic number.

13894888644 is a gapful number since it is divisible by the number (14) 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 13894888644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22356052992).

13894888644 is an abundant number, since it is smaller than the sum of its proper divisors (30817217340).

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

13894888644 is a wasteful number, since it uses less digits than its factorization.

13894888644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544 (or 519 counting only the distinct ones).

The product of its digits is 42467328, while the sum is 63.

The spelling of 13894888644 in words is "thirteen billion, eight hundred ninety-four million, eight hundred eighty-eight thousand, six hundred forty-four".