12899948544 has 648 divisors, whose sum is σ = 46984572180. Its totient is φ = 3525451776.

The previous prime is 12899948539. The next prime is 12899948549. The reversal of 12899948544 is 44584999821.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

12899948544 is a `hidden beast` number, since 1 + 2 + 89 + 9 + 9 + 4 + 8 + 544 = 666.

It is an interprime number because it is at equal distance from previous prime (12899948539) and next prime (12899948549).

It is a tau number, because it is divible by the number of its divisors (648).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12899948549) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 560867317 + ... + 560867339.

Almost surely, 2^12899948544 is an apocalyptic number.

12899948544 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 12899948544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23492286090).

12899948544 is an abundant number, since it is smaller than the sum of its proper divisors (34084623636).

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

12899948544 is an frugal number, since it uses more digits than its factorization.

12899948544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97 (or 35 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 63.

The spelling of 12899948544 in words is "twelve billion, eight hundred ninety-nine million, nine hundred forty-eight thousand, five hundred forty-four".