2181472747520 has 256 divisors, whose sum is σ = 5805327274560. Its totient is φ = 780219187200.

The previous prime is 2181472747511. The next prime is 2181472747537. The reversal of 2181472747520 is 257472741812.

It is a tau number, because it is divible by the number of its divisors (256).

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, 109926719 + ... + 109946561.

Almost surely, 2^{2181472747520} is an apocalyptic number.

2181472747520 is a gapful number since it is divisible by the number (20) 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 2181472747520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2902663637280).

2181472747520 is an abundant number, since it is smaller than the sum of its proper divisors (3623854527040).

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

2181472747520 is an equidigital number, since it uses as much as digits as its factorization.

2181472747520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19950 (or 19922 counting only the distinct ones).

The product of its (nonzero) digits is 1756160, while the sum is 50.

The spelling of 2181472747520 in words is "two trillion, one hundred eighty-one billion, four hundred seventy-two million, seven hundred forty-seven thousand, five hundred twenty".