27770556025 has 9 divisors (see below), whose sum is σ = 34436522701. Its totient is φ = 22215778240.

The previous prime is 27770556019. The next prime is 27770556031. The reversal of 27770556025 is 52065507772.

The square root of 27770556025 is 166645.

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

It is an interprime number because it is at equal distance from previous prime (27770556019) and next prime (27770556031).

It can be written as a sum of positive squares in 4 ways, for example, as 120187369 + 27650368656 = 10963^2 + 166284^2 .

It is not a de Polignac number, because 27770556025 - 2¹¹ = 27770553977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 816561 + ... + 849889.

Almost surely, 2^27770556025 is an apocalyptic number.

27770556025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

27770556025 is the 166645-th square number.

27770556025 is the 83323-rd centered octagonal number.

It is an amenable number.

27770556025 is a deficient number, since it is larger than the sum of its proper divisors (6665966676).

27770556025 is an frugal number, since it uses more digits than its factorization.

27770556025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66668 (or 33334 counting only the distinct ones).

The product of its (nonzero) digits is 1029000, while the sum is 46.

The spelling of 27770556025 in words is "twenty-seven billion, seven hundred seventy million, five hundred fifty-six thousand, twenty-five".