2129020659378 has 32 divisors (see below), whose sum is σ = 4743841132800. Its totient is φ = 707770936368.

The previous prime is 2129020659373. The next prime is 2129020659379. The reversal of 2129020659378 is 8739560209212.

2129020659378 is a `hidden beast` number, since 2 + 1 + 29 + 0 + 20 + 6 + 593 + 7 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (2129020659373) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 52830138 + ... + 52870421.

It is an arithmetic number, because the mean of its divisors is an integer number (148245035400).

Almost surely, 2^{2129020659378} is an apocalyptic number.

2129020659378 is an abundant number, since it is smaller than the sum of its proper divisors (2614820473422).

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

2129020659378 is a wasteful number, since it uses less digits than its factorization.

2129020659378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105700943 (or 105700937 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 2129020659378 in words is "two trillion, one hundred twenty-nine billion, twenty million, six hundred fifty-nine thousand, three hundred seventy-eight".