2189877031280 has 20 divisors (see below), whose sum is σ = 5091464097912. Its totient is φ = 875950812480.

The previous prime is 2189877031249. The next prime is 2189877031289. The reversal of 2189877031280 is 821307789812.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×2189877031280² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2189877031289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13686731366 + ... + 13686731525.

Almost surely, 2^{2189877031280} is an apocalyptic number.

2189877031280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2189877031280 is an abundant number, since it is smaller than the sum of its proper divisors (2901587066632).

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

2189877031280 is a wasteful number, since it uses less digits than its factorization.

2189877031280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27373462904 (or 27373462898 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 56.

The spelling of 2189877031280 in words is "two trillion, one hundred eighty-nine billion, eight hundred seventy-seven million, thirty-one thousand, two hundred eighty".