1640025675679 has 2 divisors, whose sum is σ = 1640025675680. Its totient is φ = 1640025675678.

The previous prime is 1640025675671. The next prime is 1640025675683. The reversal of 1640025675679 is 9765765200461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1640025675679 - 2³ = 1640025675671 is a prime.

It is a super-2 number, since 2×1640025675679² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1640025675671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820012837839 + 820012837840.

It is an arithmetic number, because the mean of its divisors is an integer number (820012837840).

Almost surely, 2^{1640025675679} is an apocalyptic number.

1640025675679 is a deficient number, since it is larger than the sum of its proper divisors (1).

1640025675679 is an equidigital number, since it uses as much as digits as its factorization.

1640025675679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19051200, while the sum is 58.

The spelling of 1640025675679 in words is "one trillion, six hundred forty billion, twenty-five million, six hundred seventy-five thousand, six hundred seventy-nine".