26855015625 has 189 divisors, whose sum is σ = 53495584779. Its totient is φ = 12978900000.

The previous prime is 26855015623. The next prime is 26855015633. The reversal of 26855015625 is 52651055862.

The square root of 26855015625 is 163875.

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

26855015625 is a `hidden beast` number, since 2 + 6 + 8 + 5 + 5 + 0 + 15 + 625 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 23527571769 + 3327443856 = 153387^2 + 57684^2 .

It is not a de Polignac number, because 26855015625 - 2¹ = 26855015623 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (26855015623) by changing a digit.

It is a polite number, since it can be written in 188 ways as a sum of consecutive naturals, for example, 1167609364 + ... + 1167609386.

Almost surely, 2^26855015625 is an apocalyptic number.

26855015625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

26855015625 is the 163875-th square number.

26855015625 is the 81938-th centered octagonal number.

It is an amenable number.

26855015625 is a deficient number, since it is larger than the sum of its proper divisors (26640569154).

26855015625 is an frugal number, since it uses more digits than its factorization.

26855015625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120 (or 50 counting only the distinct ones).

The product of its (nonzero) digits is 720000, while the sum is 45.

The spelling of 26855015625 in words is "twenty-six billion, eight hundred fifty-five million, fifteen thousand, six hundred twenty-five".