2128452743685 has 64 divisors (see below), whose sum is σ = 3593125785600. Its totient is φ = 1072922059008.

The previous prime is 2128452743623. The next prime is 2128452743689. The reversal of 2128452743685 is 5863472548212.

It is not a de Polignac number, because 2128452743685 - 2⁶ = 2128452743621 is a prime.

It is a super-2 number, since 2×2128452743685² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2128452743689) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 500457019 + ... + 500461271.

It is an arithmetic number, because the mean of its divisors is an integer number (56142590400).

Almost surely, 2^{2128452743685} is an apocalyptic number.

It is an amenable number.

2128452743685 is a deficient number, since it is larger than the sum of its proper divisors (1464673041915).

2128452743685 is a wasteful number, since it uses less digits than its factorization.

2128452743685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7962.

The product of its digits is 25804800, while the sum is 57.

The spelling of 2128452743685 in words is "two trillion, one hundred twenty-eight billion, four hundred fifty-two million, seven hundred forty-three thousand, six hundred eighty-five".