2120678625025 has 27 divisors (see below), whose sum is σ = 2775509067081. Its totient is φ = 1607146318080.

The previous prime is 2120678624863. The next prime is 2120678625071. The reversal of 2120678625025 is 5205268760212.

The square root of 2120678625025 is 1456255.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 711244282609 + 1409434342416 = 843353^2 + 1187196^2 .

It is not a de Polignac number, because 2120678625025 - 2²⁹ = 2120141754113 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 138336561 + ... + 138351889.

Almost surely, 2^{2120678625025} is an apocalyptic number.

2120678625025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2120678625025 is the 1456255-th square number.

2120678625025 is the 728128-th centered octagonal number.

It is an amenable number.

2120678625025 is a deficient number, since it is larger than the sum of its proper divisors (654830442056).

2120678625025 is an frugal number, since it uses more digits than its factorization.

2120678625025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30706 (or 15353 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 46.

The spelling of 2120678625025 in words is "two trillion, one hundred twenty billion, six hundred seventy-eight million, six hundred twenty-five thousand, twenty-five".