2868128538025 has 27 divisors (see below), whose sum is σ = 3641573975781. Its totient is φ = 2240857782240.

The previous prime is 2868128538019. The next prime is 2868128538049. The reversal of 2868128538025 is 5208358218682.

The square root of 2868128538025 is 1693555.

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 723637747561 + 2144490790464 = 850669^2 + 1464408^2 .

It is not a de Polignac number, because 2868128538025 - 2¹¹ = 2868128535977 is a prime.

It is a super-2 number, since 2×2868128538025² (a number of 26 digits) contains 22 as substring.

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, 364110387 + ... + 364118263.

Almost surely, 2^{2868128538025} is an apocalyptic number.

2868128538025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2868128538025 is the 1693555-th square number.

2868128538025 is the 846778-th centered octagonal number.

It is an amenable number.

2868128538025 is a deficient number, since it is larger than the sum of its proper divisors (773445437756).

2868128538025 is an frugal number, since it uses more digits than its factorization.

2868128538025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15850 (or 7925 counting only the distinct ones).

The product of its (nonzero) digits is 14745600, while the sum is 58.

The spelling of 2868128538025 in words is "two trillion, eight hundred sixty-eight billion, one hundred twenty-eight million, five hundred thirty-eight thousand, twenty-five".