2129789574684 has 72 divisors (see below), whose sum is σ = 5423223078000. Its totient is φ = 704711038464.

The previous prime is 2129789574683. The next prime is 2129789574697. The reversal of 2129789574684 is 4864759879212.

It is a happy number.

2129789574684 is a `hidden beast` number, since 2 + 1 + 2 + 9 + 78 + 95 + 7 + 468 + 4 = 666.

It is a super-2 number, since 2×2129789574684² (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 (2129789574683) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35343172 + ... + 35403380.

It is an arithmetic number, because the mean of its divisors is an integer number (75322542750).

Almost surely, 2^{2129789574684} is an apocalyptic number.

It is an amenable number.

2129789574684 is an abundant number, since it is smaller than the sum of its proper divisors (3293433503316).

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

2129789574684 is a wasteful number, since it uses less digits than its factorization.

2129789574684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67427 (or 67422 counting only the distinct ones).

The product of its digits is 487710720, while the sum is 72.

The spelling of 2129789574684 in words is "two trillion, one hundred twenty-nine billion, seven hundred eighty-nine million, five hundred seventy-four thousand, six hundred eighty-four".