2126782525 has 18 divisors (see below), whose sum is σ = 3067777050. Its totient is φ = 1458364320.

The previous prime is 2126782457. The next prime is 2126782529. The reversal of 2126782525 is 5252876212.

It can be written as a sum of positive squares in 3 ways, for example, as 497691481 + 1629091044 = 22309^2 + 40362^2 .

It is not a de Polignac number, because 2126782525 - 2¹⁷ = 2126651453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2126782529) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 866850 + ... + 869299.

Almost surely, 2^2126782525 is an apocalyptic number.

2126782525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2126782525 is a deficient number, since it is larger than the sum of its proper divisors (940994525).

2126782525 is a wasteful number, since it uses less digits than its factorization.

2126782525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1736173 (or 1736161 counting only the distinct ones).

The product of its digits is 134400, while the sum is 40.

The square root of 2126782525 is about 46117.0524318283. The cubic root of 2126782525 is about 1286.0001751526. Note that the first 3 decimals are identical.

The spelling of 2126782525 in words is "two billion, one hundred twenty-six million, seven hundred eighty-two thousand, five hundred twenty-five".