27728025025 has 6 divisors (see below), whose sum is σ = 34382751062. Its totient is φ = 22182420000.

The previous prime is 27728025023. The next prime is 27728025043. The reversal of 27728025025 is 52052082772.

It can be written as a sum of positive squares in 3 ways, for example, as 8644536576 + 19083488449 = 92976^2 + 138143^2 .

It is not a de Polignac number, because 27728025025 - 2¹ = 27728025023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27728025023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 554560476 + ... + 554560525.

Almost surely, 2^27728025025 is an apocalyptic number.

27728025025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27728025025 is a deficient number, since it is larger than the sum of its proper divisors (6654726037).

27728025025 is a wasteful number, since it uses less digits than its factorization.

27728025025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109121011 (or 1109121006 counting only the distinct ones).

The product of its (nonzero) digits is 156800, while the sum is 40.

The spelling of 27728025025 in words is "twenty-seven billion, seven hundred twenty-eight million, twenty-five thousand, twenty-five".