2128877784357 has 8 divisors (see below), whose sum is σ = 2838584696640. Its totient is φ = 1419211364160.

The previous prime is 2128877784353. The next prime is 2128877784367. The reversal of 2128877784357 is 7534877788212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2128877784357 - 2² = 2128877784353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2128877784291 and 2128877784300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2128877784353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10000132 + ... + 10210797.

It is an arithmetic number, because the mean of its divisors is an integer number (354823087080).

Almost surely, 2^{2128877784357} is an apocalyptic number.

It is an amenable number.

2128877784357 is a deficient number, since it is larger than the sum of its proper divisors (709706912283).

2128877784357 is a wasteful number, since it uses less digits than its factorization.

2128877784357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20246043.

The product of its digits is 295034880, while the sum is 69.

The spelling of 2128877784357 in words is "two trillion, one hundred twenty-eight billion, eight hundred seventy-seven million, seven hundred eighty-four thousand, three hundred fifty-seven".