12811798487400 has 384 divisors, whose sum is σ = 44105798298240. Its totient is φ = 3050233344000.

The previous prime is 12811798487381. The next prime is 12811798487471. The reversal of 12811798487400 is 478489711821.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 262873434 + ... + 262922166.

It is an arithmetic number, because the mean of its divisors is an integer number (114858849735).

Almost surely, 2^{12811798487400} is an apocalyptic number.

12811798487400 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 12811798487400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22052899149120).

12811798487400 is an abundant number, since it is smaller than the sum of its proper divisors (31293999810840).

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

12811798487400 is a wasteful number, since it uses less digits than its factorization.

12811798487400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49477 (or 49468 counting only the distinct ones).

The product of its (nonzero) digits is 7225344, while the sum is 60.

The spelling of 12811798487400 in words is "twelve trillion, eight hundred eleven billion, seven hundred ninety-eight million, four hundred eighty-seven thousand, four hundred".