2129789509148 has 48 divisors (see below), whose sum is σ = 4678713822720. Its totient is φ = 827129755584.

The previous prime is 2129789509147. The next prime is 2129789509151. The reversal of 2129789509148 is 8419059879212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2129789509147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87017411 + ... + 87041882.

It is an arithmetic number, because the mean of its divisors is an integer number (97473204640).

Almost surely, 2^{2129789509148} is an apocalyptic number.

2129789509148 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2129789509148 is an abundant number, since it is smaller than the sum of its proper divisors (2548924313572).

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

2129789509148 is a wasteful number, since it uses less digits than its factorization.

2129789509148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174059346 (or 174059344 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 65.

The spelling of 2129789509148 in words is "two trillion, one hundred twenty-nine billion, seven hundred eighty-nine million, five hundred nine thousand, one hundred forty-eight".