1640125027 has 2 divisors, whose sum is σ = 1640125028. Its totient is φ = 1640125026.

The previous prime is 1640125007. The next prime is 1640125061. The reversal of 1640125027 is 7205210461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1640125027 - 2²³ = 1631736419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1640124986 and 1640125004.

It is not a weakly prime, because it can be changed into another prime (1640125007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820062513 + 820062514.

It is an arithmetic number, because the mean of its divisors is an integer number (820062514).

Almost surely, 2^1640125027 is an apocalyptic number.

1640125027 is a deficient number, since it is larger than the sum of its proper divisors (1).

1640125027 is an equidigital number, since it uses as much as digits as its factorization.

1640125027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 1640125027 is about 40498.4570940672. The cubic root of 1640125027 is about 1179.3036749264.

Adding to 1640125027 its reverse (7205210461), we get a palindrome (8845335488).

The spelling of 1640125027 in words is "one billion, six hundred forty million, one hundred twenty-five thousand, twenty-seven".