2128491024725 has 24 divisors (see below), whose sum is σ = 2842424656512. Its totient is φ = 1571769777600.

The previous prime is 2128491024683. The next prime is 2128491024763. The reversal of 2128491024725 is 5274201948212.

It is not a de Polignac number, because 2128491024725 - 2¹⁸ = 2128490762581 is a prime.

It is a super-2 number, since 2×2128491024725² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2128491024725.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24159104 + ... + 24247046.

It is an arithmetic number, because the mean of its divisors is an integer number (118434360688).

Almost surely, 2^{2128491024725} is an apocalyptic number.

2128491024725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2128491024725 is a deficient number, since it is larger than the sum of its proper divisors (713933631787).

2128491024725 is a wasteful number, since it uses less digits than its factorization.

2128491024725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162437 (or 162432 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 47.

The spelling of 2128491024725 in words is "two trillion, one hundred twenty-eight billion, four hundred ninety-one million, twenty-four thousand, seven hundred twenty-five".