27970890025 has 81 divisors (see below), whose sum is σ = 39280924197. Its totient is φ = 19748289600.

The previous prime is 27970890011. The next prime is 27970890029. The reversal of 27970890025 is 52009807972.

The square root of 27970890025 is 167245.

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 7209538281 + 20761351744 = 84909^2 + 144088^2 .

It is not a de Polignac number, because 27970890025 - 2⁷ = 27970889897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27970890029) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 336998634 + ... + 336998716.

Almost surely, 2^27970890025 is an apocalyptic number.

27970890025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

27970890025 is the 167245-th square number.

27970890025 is the 83623-rd centered octagonal number.

It is an amenable number.

27970890025 is a deficient number, since it is larger than the sum of its proper divisors (11310034172).

27970890025 is an equidigital number, since it uses as much as digits as its factorization.

27970890025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 49.

Multiplying 27970890025 by its sum of digits (49), we get a square (1370573611225 = 1170715²).

The spelling of 27970890025 in words is "twenty-seven billion, nine hundred seventy million, eight hundred ninety thousand, twenty-five".