2181280601600 has 60 divisors (see below), whose sum is σ = 5404293134724. Its totient is φ = 872512235520.

The previous prime is 2181280601581. The next prime is 2181280601603. The reversal of 2181280601600 is 61060821812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181280601603) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 85193474 + ... + 85219073.

Almost surely, 2^{2181280601600} is an apocalyptic number.

2181280601600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2181280601600 is an abundant number, since it is smaller than the sum of its proper divisors (3223012533124).

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

2181280601600 is an equidigital number, since it uses as much as digits as its factorization.

2181280601600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170412575 (or 170412554 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The spelling of 2181280601600 in words is "two trillion, one hundred eighty-one billion, two hundred eighty million, six hundred one thousand, six hundred".