12901178880 has 160 divisors (see below), whose sum is σ = 45826308000. Its totient is φ = 3440295936.

The previous prime is 12901178879. The next prime is 12901178911. The reversal of 12901178880 is 8887110921.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 24205 + ... + 162444.

It is an arithmetic number, because the mean of its divisors is an integer number (286414425).

Almost surely, 2^12901178880 is an apocalyptic number.

12901178880 is a gapful number since it is divisible by the number (10) 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 12901178880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22913154000).

12901178880 is an abundant number, since it is smaller than the sum of its proper divisors (32925129120).

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

12901178880 is an equidigital number, since it uses as much as digits as its factorization.

12901178880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186681 (or 186659 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 45.

The spelling of 12901178880 in words is "twelve billion, nine hundred one million, one hundred seventy-eight thousand, eight hundred eighty".